Definition of injection in US English:

injection

noun

  • 1An instance of injecting or being injected.

    ‘painkilling injections’
    ‘an injection of capital was needed’
    • ‘The vaccine involves a single injection for children under 12 and two injections for teenagers and adults.’
    • ‘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.’
    • ‘‘They certainly provide large cash injections for headquarters,’ he says.’
    • ‘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.’
    • ‘There is no proven benefit to topical ointments, suppositories, or injections of local anesthetic.’
    • ‘In most instances, they should not receive intramuscular injections.’
    • ‘Some degree of neck or back pain is common after this operation, but relief can be achieved with pain-killing injections or tablets.’
    • ‘The injection of local anesthetic serves as a therapeutic trial and may not provide permanent relief.’
    • ‘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.’
    • ‘No longer concerned with long-term economic development, the authority is banking on a fast injection of international cash merely to stay solvent.’
    • ‘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.’
    • ‘Filler injections are used to smooth scarred, wrinkled, or furrowed skin on the face.’
    • ‘The buy-out will give the business a fresh injection of energy and help us move it forward on its strongest footing.’
    • ‘The area is numbed with an injection of local anesthetic.’
    • ‘It also highlighted excessive use of injections and blood transfusions without proper sterilisation.’
    • ‘Your doctor or nurse will give you painkilling tablets or injections to reduce any pain that you have after the operation.’
    • ‘Woodside, wearing a familiar path in Australian corporate history, needed a huge injection of foreign cash to turn its dream into a reality.’
    • ‘A fully protective course is three intramuscular injections.’
    • ‘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.’
    • ‘It has experienced money problems, needing frequent injections of cash to stay alive.’
    inoculation, vaccination, vaccine, immunization, booster, dose
    administration, introduction
    View synonyms
    1. 1.1 A thing that is injected.
      ‘a morphine injection’
      • ‘The pain subsided more than usual and I was spared the pin cushion process of endless morphine injections.’
      • ‘Some patients benefit from physical therapy and cortisone injections.’
      • ‘Other treatments include physical therapy, exercise, cortisone injections and joint replacement surgery.’
      • ‘In rare instances, insulin injections may cause you to experience breathing or swallowing difficulties.’
      • ‘The patient was subjected to mineral oil injections as an experimental therapy to promote hair growth, but no hair growth was ever noted.’
      • ‘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.’
      • ‘Although I have a very high pain threshold, I was requiring more and more morphine injections.’
      • ‘In some patients, compensatory sweating can be treated effectively with intradermal botulinum toxin injections.’
      • ‘In the United States erythropoetin injections or autologous blood donations, given preoperatively, are commonly used.’
      • ‘Intravenous and intradermal opioid injections also may induce itching.’
      • ‘As stated earlier, the duration of results from collagen injections is variable.’
      • ‘A local dermatologist administered cortisone injections with little or no improvement.’
      inoculation, vaccination, vaccine, immunization, booster, dose
      View synonyms
    2. 1.2 The action of injecting.
      ‘sometimes a polio vaccine is given by injection’
      • ‘Biologic treatments may be administered by injection or IV infusion.’
      • ‘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.’
      • ‘Samples were introduced by gravity injection from 20 cm height for 20 s.’
      • ‘Half the women received magnesium sulfate by injection or infusion in the hospital over about 24 hours, and the rest got a placebo.’
      • ‘Primary mesenchyme cells introduced by injection at the animal pole move in a directed manner to their normal positions in the vegetal region.’
      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.’
      • ‘Prices rise to £20,965 for the seven-seater Sport 2.0-litre turbo diesel injection model.’
      • ‘The common rail also serves as a pressure reservoir while providing furl to the injection jets.’
      • ‘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.’
      • ‘A proportion of the new model was sold with the carry-over, 2.5 litre, 8 valve, indirect injection diesel engine.’
      • ‘Using revolution counters, the system can analyze the injection parameters of each cylinder and adjust them if necessary.’
      • ‘Direct injection yields a stratified charge: a rich mixture near the spark plug with a progressively leaner fuel-air ratio deeper in the cylinder.’
      • ‘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.’
      • ‘To accomplish the requirements for the multi-material capability that Husky was seeking, a second injection unit was added to the machine.’
      • ‘He would buy new points, plugs and something to put in the injection system.’
      • ‘Also, a dependable brand of fuel injection prevents common injection problems such as varnish deposits, clogging and fuel leakage.’
      • ‘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.’
      • ‘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.’
  • 2The entry or placing of a spacecraft or other object into an orbit or trajectory.

    • ‘Since injection into orbit the spacecraft's behaviour has been nominal.’
    • ‘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.’
    • ‘An autonomous telemetry system transmitted data on the payload environment during all the flight phases, from liftoff to in-orbit injection.’
    • ‘The spacecraft becomes fully automated after injection into orbit.’

Origin

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

Pronunciation

injection

/inˈjekSH(ə)n//ɪnˈdʒɛkʃ(ə)n/