injection

UK: /ɪnˈdʒɛkʃ^ən/ US: /ɪnˈdʒɛkʃən/ ,(in jek′shən)

WordReference Random House Learner's Dictionary of American English © 2025

in•jec•tion /ɪnˈdʒɛkʃən/   n. 

1. the act of injecting:
   [uncountable] The drug must be administered by injection.
   [countable] Injections can be given under the skin.
2. the act of bringing something (into something else):
   [countable] an injection of financial support.
See -jec-.

WordReference Random House Unabridged Dictionary of American English © 2025

in•jec•tion  (in jek′shən), n. 

1. the act of injecting.
2. something that is injected.
3. Drugs a liquid injected into the body, esp. for medicinal purposes, as a hypodermic or an enema.
4. Pathology state of being hyperemic or bloodshot.
5. Mathematics a one-to-one function.
6. Aerospace Also called insertion. the process of putting a spacecraft into orbit or some other desired trajectory.

• Latin injectiōn- (stem of injectiō). See inject, -ion
• 1535–45

Collins Concise English Dictionary © HarperCollins Publishers::

injection / ɪnˈdʒɛkʃən/ noun

1. fluid injected into the body, esp for medicinal purposes
2. something injected
3. the act of injecting
4. the act or process of introducing fluid under pressure, such as fuel into the combustion chamber of an engine
5. (as modifier): injection moulding

inˈjective adjective