Definitions
1.nounAn angle or part that reenters itself.
2.nounOne who enters (the labour market, etc.) again.
3.nounA valley between a pair of parallel ridges
4.adjectiveReentering; pointing inward.
5.adjective(of a mutual exclusion mechanism) Such that the corresponding lock can be reacquired by the locking thread."The global interpreter lock of the embedded scripting engine is not reentrant."
6.adjectiveThat may be executed more than once at a time either by different threads, or because of recursion."Global variables must not be altered by reentrant code."
7.adjective(of a part of a rocket) Designed to return to the Earth's atmosphere.
8.adjectiveOf or pertaining to reentry (in the heart)
9.adjective(of a ukulele or similar instrument) Having the strings not ordered according to pitch (having a re-entry)