inject

UK: /ɪnˈdʒɛkt/ US: /ɪnˈdʒɛkt/ ,(in jekt′)

WordReference Random House Learner's Dictionary of American English © 2026

in•ject /ɪnˈdʒɛkt/   v. 

1. Medicine to force (a fluid) into a part of the body with a special needle: [~ + object + into + object]
   The nurse injected the drug into the patient.
   [~ + object + with + object]
   She injected the patient with the drug.
2. to introduce (something different):
   [~ + object + into + object] The host tried to inject some humor into the situation.
3. to interject (a remark, etc.), as into conversation:
   [~ + object] had remarks that he wished to inject at that moment.

in•jec•tor, n. [countable] See -jec-.

WordReference Random House Unabridged Dictionary of American English © 2026

in•ject  (in jekt′), v.t. 

1. Medicine to force (a fluid) into a passage, cavity, or tissue:
   to inject a medicine into the veins.
2. to introduce (something new or different):
   to inject humor into a situation.
3. to introduce arbitrarily or inappropriately;
   intrude.
4. to interject (a remark, suggestion, etc.), as into conversation.

• Latin injectus past participle of in(j)icere to throw in, equivalent. to in- in-² + -jec- (combining form of jac- throw) + -tus past participle suffix
• 1590–1600

inject., 

1. Medicine (in prescriptions) an injection.

• Latin injectiō

Collins Concise English Dictionary © HarperCollins Publishers::

inject / ɪnˈdʒɛkt/ verb (transitive)

1. to introduce (a fluid) into (the body of a person or animal) by means of a syringe or similar instrument
2. (followed by into) to introduce (a new aspect or element): to inject humour into a scene
3. to interject (a comment, idea, etc)

Etymology: 17th Century: from Latin injicere to throw in, from jacere to throw

inˈjectable adjective