Definition of injection in English:

injection

noun

  • 1An instance of injecting or being injected.

    ‘painkilling injections’
    ‘an injection of capital was needed’
    • ‘It shows that, despite the promise of massive cash injections and a public debate, there is still a massive gulf between people's expectations and the reality of diagnosis.’
    • ‘The injection of local anesthetic serves as a therapeutic trial and may not provide permanent relief.’
    • ‘There is no proven benefit to topical ointments, suppositories, or injections of local anesthetic.’
    • ‘No longer concerned with long-term economic development, the authority is banking on a fast injection of international cash merely to stay solvent.’
    • ‘Woodside, wearing a familiar path in Australian corporate history, needed a huge injection of foreign cash to turn its dream into a reality.’
    • ‘Your doctor or nurse will give you painkilling tablets or injections to reduce any pain that you have after the operation.’
    • ‘But an amendment was inserted to remove reference to privately-funded city academies and schools that receive extra injections of cash for having a specialism.’
    • ‘I think he is one of those managers who got jobs not necessarily because of any real tactical astuteness, but because chairmen felt their club needed a lift or an injection of personality.’
    • ‘Filler injections are used to smooth scarred, wrinkled, or furrowed skin on the face.’
    • ‘The company had put forward two proposals and the deadline to vote on the second - involving regular cash injections over the next ten years - expired yesterday.’
    • ‘The area is numbed with an injection of local anesthetic.’
    • ‘Some degree of neck or back pain is common after this operation, but relief can be achieved with pain-killing injections or tablets.’
    • ‘A fully protective course is three intramuscular injections.’
    • ‘In most instances, they should not receive intramuscular injections.’
    • ‘‘They certainly provide large cash injections for headquarters,’ he says.’
    • ‘The buy-out will give the business a fresh injection of energy and help us move it forward on its strongest footing.’
    • ‘The vaccine involves a single injection for children under 12 and two injections for teenagers and adults.’
    • ‘It has experienced money problems, needing frequent injections of cash to stay alive.’
    • ‘It also highlighted excessive use of injections and blood transfusions without proper sterilisation.’
    • ‘While the precise details of the scheme are still to be worked out, Labour sources said the preferred option is for the trusts to receive an initial injection of state cash and then build the prisons using private labour and money.’
    inoculation, vaccination, vaccine, immunization, booster, dose
    administration, introduction
    View synonyms
    1. 1.1 A thing that is injected.
      ‘a morphine injection’
      • ‘In some patients, compensatory sweating can be treated effectively with intradermal botulinum toxin injections.’
      • ‘As stated earlier, the duration of results from collagen injections is variable.’
      • ‘Participants were randomly given influenza vaccine and placebo injections, at least five days apart.’
      • ‘Cortisone injections usually work within a few days, and the effects can last up to several weeks.’
      • ‘Some patients benefit from physical therapy and cortisone injections.’
      • ‘The patient was subjected to mineral oil injections as an experimental therapy to promote hair growth, but no hair growth was ever noted.’
      • ‘The pain subsided more than usual and I was spared the pin cushion process of endless morphine injections.’
      • ‘In rare instances, insulin injections may cause you to experience breathing or swallowing difficulties.’
      • ‘In the United States erythropoetin injections or autologous blood donations, given preoperatively, are commonly used.’
      • ‘Intravenous and intradermal opioid injections also may induce itching.’
      • ‘Other treatments include physical therapy, exercise, cortisone injections and joint replacement surgery.’
      • ‘A local dermatologist administered cortisone injections with little or no improvement.’
      • ‘Although I have a very high pain threshold, I was requiring more and more morphine injections.’
      inoculation, vaccination, vaccine, immunization, booster, dose
      View synonyms
    2. 1.2mass noun The action of injecting.
      ‘the walls have been damp-proofed by injection’
      • ‘Half the women received magnesium sulfate by injection or infusion in the hospital over about 24 hours, and the rest got a placebo.’
      • ‘EDITOR We have three comments about Pickup et al's meta-analysis comparing insulin infusion with injection, which may cast a different light on their main conclusion.’
      • ‘Iron sucrose should be administered intravenously, directly into the dialysis line, either by slow injection or by infusion.’
      • ‘Usually they are given by intravenous injection, by infusion pump into a vein or orally.’
      • ‘Primary mesenchyme cells introduced by injection at the animal pole move in a directed manner to their normal positions in the vegetal region.’
      • ‘Samples were introduced by gravity injection from 20 cm height for 20 s.’
      • ‘Biologic treatments may be administered by injection or IV infusion.’
      administration, introduction
      introduction, instilling, infusion, imbuing, inculcation
      View synonyms
    3. 1.3
      short for fuel injection
      • ‘We are making big inroads with our diesel injection technology, and currently we equip the Duramax and Cummins light truck diesel engines with our components.’
      • ‘To accomplish the requirements for the multi-material capability that Husky was seeking, a second injection unit was added to the machine.’
      • ‘Compared to the systems in today's direct-injected diesels, the injection systems will probably operate at lower pressures, which will keep the costs down.’
      • ‘A proportion of the new model was sold with the carry-over, 2.5 litre, 8 valve, indirect injection diesel engine.’
      • ‘The common rail also serves as a pressure reservoir while providing furl to the injection jets.’
      • ‘Using revolution counters, the system can analyze the injection parameters of each cylinder and adjust them if necessary.’
      • ‘While the Ford-PSA and Renault engines use the same injection system, the Renault engine has an iron block, two valves per cylinder and is to be made in only one size.’
      • ‘Direct injection yields a stratified charge: a rich mixture near the spark plug with a progressively leaner fuel-air ratio deeper in the cylinder.’
      • ‘Also, a dependable brand of fuel injection prevents common injection problems such as varnish deposits, clogging and fuel leakage.’
      • ‘Direct injection allows precise control of the quantity of fuel injected and the fuel spray pattern, bringing the petrol engine closer to the efficiency of a diesel.’
      • ‘He would buy new points, plugs and something to put in the injection system.’
      • ‘Prices rise to £20,965 for the seven-seater Sport 2.0-litre turbo diesel injection model.’
      • ‘However, in comparison with more recent rivals, its 3.0 litre diesel engine with a classic injection system and 125 bhp output had begun to seem outclassed.’
  • 2mass noun The entry or placing of a spacecraft or other object into an orbit or trajectory.

    • ‘The spacecraft becomes fully automated after injection into orbit.’
    • ‘Since injection into orbit the spacecraft's behaviour has been nominal.’
    • ‘An autonomous telemetry system transmitted data on the payload environment during all the flight phases, from liftoff to in-orbit injection.’
    • ‘The orbit injection by the Ariane rocket used to launch Rosetta was so accurate that only a small amount of fuel was needed to make some tiny corrections.’
  • 3Mathematics
    A one-to-one mapping.

Origin

Late Middle English: from Latin injectio(n-), from the verb inicere (see inject).

Pronunciation

injection

/ɪnˈdʒɛkʃ(ə)n/