Definition from Wiktionary, the free dictionary
- Used other than as an idiom: see drop, out.
- (idiomatic) To prematurely and voluntarily leave (school, a race, or the like).
- Nothing went well in high school, so he dropped out.
- To opt out of conventional society.
- (of sound, electronic signal, etc.) To be lost or momentarily interrupted.
- I can't make phone calls because the line keeps dropping out.
- Often used with of: “drop out of the race”