/ ɪnˈdʒekt; NAmE / verb [ vn ]
1.
inject sth (into yourself / sb / sth) | inject yourself / sb / sth (with sth) to put a drug or other substance into a person's or an animal's body using a syringe :
Adrenalin was injected into the muscle.
She has been injecting herself with insulin since the age of 16.
2.
inject A (into B) | inject B (with A) to put a liquid into sth using a syringe or similar instrument :
Chemicals are injected into the fruit to reduce decay.
The fruit is injected with chemicals to reduce decay.
3.
inject sth (into sth) to add a particular quality to sth :
His comments injected a note of humour into the proceedings.
4.
inject sth (into sth) to give money to an organization, a project, etc. so that it can function :
They are refusing to inject any more capital into the industry.
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WORD ORIGIN
late 16th cent. (in the sense throw or cast on something ): from Latin inject- thrown in, from the verb inicere , from in- into + jacere throw.