Definition of fatigue in English:



  • 1mass noun Extreme tiredness resulting from mental or physical exertion or illness.

    ‘he was nearly dead with fatigue’
    • ‘Symptoms of hepatitis include chronic fatigue and liver problems.’
    • ‘Caffeine prevents mental and physical fatigue by blocking receptors that notify the brain of low energy levels.’
    • ‘It is characterised by overwhelming mental and physical fatigue accompanied by a wide range of other symptoms.’
    • ‘There are different kinds of fatigue associated with cancer therapies.’
    • ‘According to research, drivers aged under 30 are most likely to be affected by driver fatigue.’
    • ‘So often one hears of driver fatigue being the cause of extremely serious accidents.’
    • ‘Even so, the job saps the vitality, and a referee gets mental fatigue as well as physical.’
    • ‘A 75-year-old man was evaluated for unexplained chronic fatigue, lethargy, and weight loss.’
    • ‘Her first patient of the day was on thyroid replacement but continued to experience chronic fatigue and lack of energy.’
    • ‘But a critical distinction needs to be drawn between physical and mental fatigue.’
    • ‘You should also be aware of the increased fatigue associated with this transition.’
    • ‘The risk factors associated with unexplained fatigue were no different from those associated with cognitive symptoms or unexplained musculoskeletal complaints.’
    • ‘Throughout the ordeal, Crystal experienced severe fatigue, nausea and weight loss.’
    • ‘The symptoms of this illness were excessive physical fatigue, inability to concentrate, and an unwillingness to eat or drink.’
    • ‘Other medical conditions can cause extreme fatigue or changes in appetite and sleep.’
    • ‘Sleepiness and fatigue can affect physical and mental capabilities to perform at safe levels.’
    • ‘Two major causes of premature fatigue during exercise are dehydration and carbohydrate depletion.’
    • ‘This can cause a person to experience physical fatigue, along with mental fogginess, difficulty in concentrating, and dullness of the mind.’
    • ‘Research shows that driver fatigue is a factor in approximately 25 % of all accidents on motorways and trunk roads.’
    • ‘Eventually fatigue overtook my body, and I knew it was time to stop.’
    tiredness, weariness, exhaustion, overtiredness
    View synonyms
    1. 1.1 A reduction in the efficiency of a muscle or organ after prolonged activity.
      ‘buccinator and orbicularis oris muscles showing signs of fatigue’
      • ‘The authors conclude that leg effort and fatigue of the quadriceps are infrequent after walking in patients with COPD.’
      • ‘Resistance to fatigue of this muscle group was also enhanced.’
      • ‘Respiratory muscle fatigue develops when demand for energy exceeds the supply of energy.’
      • ‘Increased muscle creatine also buffers the lactic acid produced during exercise, delaying muscle fatigue and soreness.’
      • ‘Glutamine helps to prevent muscle fatigue, thus allowing you to rip out more reps.’
      • ‘Some patients could have stopped exercising due to nonventilatory reasons, such as leg muscle fatigue.’
      • ‘In contrast, the increase in the sensation of muscle fatigue was high.’
      • ‘A key problem in many patients with respiratory failure requiring intubation is fatigue of respiratory muscles.’
      • ‘Clearly, these patients were limited in their exercise tolerance by fatigue of their muscles of ambulation.’
      • ‘What are the best tests for assessing respiratory muscle fatigue?’
      • ‘This could make the inspiratory muscles vulnerable to the development of muscle fatigue.’
      • ‘Subjects rated perceived symptoms of breathlessness and muscle fatigue at the end of the test.’
      • ‘The sensations of dyspnea and muscle fatigue were measured at rest and immediately after exercise on a 10-cm visual analog scale.’
      • ‘This study was not intended to investigate the cause of muscle fatigue in COPD.’
      • ‘Acute pancreatitis and fatigue of the diaphragm muscle are also associated with damage caused by ROS.’
      • ‘Everything ached all of a sudden, muscle fatigue setting in at last from dragging Rob halfway around the city.’
      • ‘The frequency of frank respiratory muscle fatigue in acute asthma is unknown, but is probably low.’
      • ‘The remaining patients complained of leg fatigue as the predominant symptom limiting exercise.’
      • ‘Thus, in patients with severe airway obstruction, inspiratory muscle fatigue may limit exercise performance.’
      • ‘She cited severe leg fatigue as the reason for limitation of exercise.’
    2. 1.2with modifier A lessening in one's response to or enthusiasm for something, caused by overexposure.
      ‘votes were showing signs of election fatigue’
      • ‘How will the parties defeat election fatigue and boost declining turn-out numbers?’
      • ‘Your senses become better attuned to art when the light is fresh; you are less subject to museum fatigue.’
      • ‘He revealed a bit of fundraiser fatigue in response.’
      • ‘The news from Lone Star Park, Texas is that all is well, and that the local media, doubtless suffering from presidential election fatigue, is lapping her up.’
      • ‘It's the sitting-down equivalent of museum/gallery fatigue, that special ailment of travellers everywhere.’
      • ‘Second, many of those voters develop election fatigue and begin to tune out much of the information.’
      • ‘Even now a certain amount of election fatigue is beginning to set in.’
      • ‘Might the increase in the number of elections and referendums have induced election fatigue?’
      • ‘The Museo de las Culturas de Oaxaca is in a former monastery and a wander around the airy cloisters or in the excellent cacti garden offer a respite from any cases of museum fatigue.’
  • 2Weakness in metal or other materials caused by repeated variations of stress.

    ‘metal fatigue’
    • ‘Sunlight provides the necessary heat, and metal fatigue and design imperfections make the tracks more malleable.’
    • ‘Engineers have also been looking at the threat of lightning, metal fatigue and noise.’
    • ‘Slip bands have been observed at stresses below the fatigue limit of ferrous materials.’
    • ‘Nearly complete elimination of inclusions by vacuum melting produces a considerable increase in the transverse fatigue limit.’
    • ‘However, we're close to the limit in terms of metal fatigue and durability.’
    • ‘That along with corrosion and metal fatigue cased the bridge to fail.’
    • ‘There is evidence of significant metal fatigue damage to the rails in the vicinity’
    • ‘If inappropriately sized, the fasteners can suffer metal fatigue leading to structural failure.’
    • ‘Metal fatigue is one concern, damage incurred during liftoff is another.’
    • ‘It seems that the cause of the stirrup breaking was either metal fatigue or some manufacturing defect.’
    • ‘The procedures for applying these methods of analysis to the determination of the fatigue limit have been well established.’
    • ‘The children don't know anything about metal fatigue, turbulence, and mid-air collisions.’
    • ‘Investigators said the fatigue cracks on the planes that crashed were confined to the wing structures.’
    • ‘The fatigue properties of metals are quite structure-sensitive.’
    • ‘But, the pistol is 62 years old, and metal fatigue sets in after a while.’
    • ‘Unfortunately, metal fatigue kept causing it to crash.’
    • ‘Energy from the magnet is designed to elongate the atoms in the clubface, deterring metal fatigue and strengthening the face.’
    • ‘The spar had actually twisted as a result of metal fatigue and failure.’
  • 3fatiguesMenial non-military tasks performed by a soldier, sometimes as a punishment.

    ‘we're on cookhouse fatigues, sir’
    • ‘When they were not performing work fatigues or training, soldiers were instructed during the time spent in the rear areas.’
    menial work, drudgery, chores, donkey work
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    1. 3.1count noun A group of soldiers ordered to do menial tasks.
  • 4fatiguesLoose clothing, typically khaki, olive drab, or camouflaged, of a sort worn by soldiers on active duty.

    ‘battle fatigues’
    • ‘After dinner, Roger appeared in military fatigues, complete with hat, sunglasses, jackboots, and swagger stick.’
    • ‘On the outskirts of town, soldiers in fatigues continued to focus on their search.’
    • ‘One evening in Cusco, a group of revolutionary militants clad in army fatigues came to the meeting.’
    • ‘Soldiers in camouflage fatigues and painted faces also carried heavy artillery to provide protective fire power in the event of a genuine security threat.’
    • ‘He turned to see a figure dressed in faded military fatigues.’
    • ‘He is decked out with the standard dictatorial outfit of military fatigues and large cigar.’
    • ‘Some of the soldiers' fatigues were splashed in blood and filth.’
    • ‘We also used to wear gunnery qualification badges on our fatigues.’
    • ‘And he was wearing old army fatigues and combat boots.’
    • ‘He had on dark combat boots, green fatigues, and had a big black machine gun in his hand.’
    • ‘When they finally parted 10 years later she was dressed in ‘military fatigues and working as an anthropologist on an Aboriginal island’.’
    • ‘Dozens of young troops in military fatigues marched in formation and conducted a series of calisthenic drills and martial-arts exercises at an abandoned dirt lot.’
    • ‘He was wearing his snug army t-shirt, baggy fatigues and combat boots.’
    • ‘The battery-operated doll comes complete with walkie-talkie and a wardrobe choice of military fatigues or bolero jacket and gold trousers.’
    • ‘The soldier had changed wardrobe and discarded his old army fatigues for good.’
    • ‘Seated next to me in the lounge was a group of soldiers dressed in battle fatigues.’
    • ‘The whole army was dressed in old British army fatigues from World War II, which gave the situation a surreal cinematic air.’
    • ‘She looked Indian, and had on green camouflage fatigues.’
    • ‘She's become accustomed to the sound of fire engines and the sight of soldiers in fatigues searching vehicles.’
    • ‘The figure is wearing military fatigues over a black shirt and a black and white checked scarf wrapped around his head.’
    khakis, camouflage clothing, camouflage gear
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[with object]
  • 1Cause (someone) to feel exhausted.

    ‘they were fatigued by their journey’
    • ‘I was fatigued and all I wanted to do was get out of here.’
    • ‘It doesn't matter who you are, how strong, how smart, how fast - if you get fatigued you are exponentially raising your chances of being in a car accident.’
    • ‘It was either this or he was fatigued due to a long day and some inclement weather, which meant that he could not physically take this bend.’
    • ‘These are the same symptoms fatigued drivers face each minute longer they stay on the road than necessary.’
    • ‘Keep your movement throughout each set continuous, then rest a normal amount of time (up to about a minute) between sets, even if you are not fatigued.’
    • ‘So all of a sudden he is too fatigued to make the same tackle he made in the first half.’
    • ‘A headache like that can really fatigue a person.’
    • ‘But if you are fatigued and have low energy, I think you can really affect how you feel by how you eat.’
    • ‘I wasn't fatigued, of course; I actually was a very fit individual.’
    • ‘There are other categories, but it fatigues me to list them.’
    • ‘He was working nonstop and he was very fatigued.’
    • ‘This considered, I felt slightly frustrated by the fact our opening league game was having to be played by pretty fatigued players.’
    • ‘It doesn't make much sense to train hard when you are fatigued.’
    • ‘But if you are fatigued, be prepared to face the reality that we are all overworked, overstressed and overbooked.’
    • ‘It's true - you are unbelievably fatigued after one of his slow-count sessions and feel more than justified in taking the extra days to recover.’
    • ‘I am always fatigued, my body shakes and sweats.’
    • ‘We were a bit fatigued before the quarter-final after all the hard training we have done.’
    • ‘I simply tend to forget how fatigued normal people can become.’
    • ‘If you give up easily when you're fatigued, we'll notice that, too.’
    • ‘Try one, and you'll notice that you can become totally fatigued from just one exercise.’
    tire, tire out, exhaust, wear out, drain, make weary, weary, wash out, tax, overtax, overtire, jade, make sleepy
    View synonyms
    1. 1.1 Reduce the efficiency of (a muscle or organ) by prolonged activity.
      ‘different sensory fibres within the normal retina could be selectively fatigued’
      • ‘Remember, fatiguing the muscle isn't the point; building explosive power for optimal recruitment of fast-twitch muscle fibers is.’
      • ‘My legs are cramped and my muscles are fatigued.’
      • ‘Whereas only 1 of the 12 patients fatigued their quadriceps after an ISW, two thirds of the same patients did so after incremental cycling.’
      • ‘Doing more reps will only fatigue your muscles, which will decrease your speed and place you at greater risk for injury.’
      • ‘If your smaller muscles are fatigued, they can't provide the necessary help.’
      • ‘Just make sure you use weights that are heavy enough to fatigue your muscles after eight to 12 repetitions.’
      • ‘My only concern is that you find the ideal weight/rep combination that allows you to optimally fatigue the target muscle in the shortest time.’
      • ‘If you truly fatigue a muscle during your workout, then it should require about a week to recuperate adequately before training it again.’
      • ‘Lifting heavier weights will tone your muscles while fatiguing them in the process.’
      • ‘If you can do 12 reps without fatiguing your target muscles, increase the weight by 2-5 percent rather than doing additional reps.’
      • ‘Adding weight, like a medicine ball, to your exercises is an effective way to fatigue your muscles, he adds.’
      • ‘Do these exercises at the end of your regular strength-training workout because you will fully fatigue your abs performing these exercises.’
      • ‘Muscle glycogen breakdown leads to lactic acid production, which fatigues the muscle.’
      • ‘Perform each exercise in perfect form with a weight heavy enough to fatigue the muscle in just a few repetitions.’
      • ‘If I have a little bit of energy left at the end of my workout, I'll do something like a drop set for my shoulders and really fatigue the muscle.’
      • ‘In mild cases it may be necessary to fatigue the symptomatic muscle.’
      • ‘Do three sets of 15-20 reps with weights heavy enough to fatigue your muscles within the suggested rep range.’
      • ‘Three well-planned exercises performed properly will always fully fatigue the triceps.’
      • ‘If your midsection muscles don't feel fatigued by the final rep of each set, your form may be to blame.’
      • ‘Always use enough weight to fatigue your muscles by the final rep of each set.’
  • 2Weaken (a metal or other material) by repeated variations of stress.

    ‘the nails have become rusted through or fatigued’
    • ‘It's steel, so it doesn't fatigue, rust or corrode.’
    • ‘Given the thin faces of today's drivers, how long does a driver last before the metal becomes fatigued?’
    • ‘Repeated stretching and sizing fatigues the brass to the point where it will eventually split, but I restrict things a little more.’
    • ‘Have you ever bent a piece of metal back-and-forth until it fatigues and breaks?’
    • ‘For carbon forks in general, there should not be any limited life span, as carbon composites themselves are not subject to fatigue failures as metals are.’


Mid 17th century (in the sense ‘task that causes weariness’): from French fatigue (noun), fatiguer (verb), from Latin fatigare ‘tire out’, from ad fatim, affatim ‘to satiety or surfeit’.