Definition of lethargic in English:



  • Affected by lethargy; sluggish and apathetic.

    ‘I felt tired and a little lethargic’
    • ‘If we are too relaxed, we become lethargic, wasteful and languid.’
    • ‘Most claimed to be fully adherent only on occasions when they felt lethargic or unwell.’
    • ‘However, presentations where a patient is hypo-alert and lethargic may go unrecognised.’
    • ‘After seemingly endless weeks of constant commotion, they appear listless and lethargic.’
    • ‘I got very sick and I had inflammation of the brain, and I was very lethargic.’
    • ‘Is he shaking with rigors, is he awake and alert and comfortable, or is he lethargic?’
    • ‘If you are confused, lethargic, or have a fever, someone should take you to the hospital.’
    • ‘The boy was lethargic and confused but seemed to recognise his mother.’
    • ‘Its rulers could not have been that lethargic, or its diplomacy so tortuous, for it to have survived for such a long period.’
    • ‘Her health was poor, although stable, until the morning of admission, when she became disoriented and lethargic.’
    • ‘Mrs Lewis said she had felt unwell, lethargic, irritable and overweight for many years.’
    • ‘They looked tired and lethargic with absolutely none of the sparkle we have associated with them in the past.’
    • ‘I breeze through the Pilates class, where everybody else was tired and lethargic.’
    • ‘Furthermore, filling up on fatty foods like bacon or cheese makes you tired, lethargic and apathetic.’
    • ‘While such a form of epilepsy would not feature seizures, the condition can be seen in lethargic children.’
    • ‘As a result, many seemed lethargic and sluggish when it came to taking the game to Brazil in the second half.’
    • ‘All of us were suffering from headaches, feeling nauseated and very lethargic.’
    • ‘If the cat is lethargic and his coat is dull and unhealthy looking, this too may be a sign.’
    • ‘Over the previous two days he had been feeling increasingly tired, lethargic, polyuric, and thirsty.’
    • ‘He had pneumonia and diarrhoea and was severely anaemic and lethargic.’
    sluggish, inert, inactive, slow, torpid, lifeless, dull
    languid, listless, lazy, idle, indolent, shiftless, slothful, phlegmatic, apathetic, passive, weary, tired, fatigued, sleepy, drowsy, enervated, somnolent, narcotic
    View synonyms


Late Middle English: via Latin from Greek lēthargikos, from lēthargos forgetful.