/in jekt"/ , v.t.
1. 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.
[ 1590-1600; injectus ptp. of in ( j ) icere to throw in, equiv. to in- IN- 2 + -jec- (comb. form of jac- throw) + -tus ptp. suffix ]