- to force or drive (a fluid) into some passage, cavity, or chamber; esp., to introduce or force (a liquid) into some part of the body by means of a syringe, hypodermic needle, etc.
- to fill by, or subject to, injection
- to introduce (a missing feature, quality, etc.): to inject a note of humor into a story
- to interject (a remark, opinion, etc.) as into a discussion
Origin of injectfrom Classical Latin injectus, past participle of injicere, to throw, cast, or put in from in-, in + jacere, to throw: see jet