An angle or part that reenters itself.

One who enters (the labour market, etc.) again.

(geography) A valley between a pair of parallel ridges.

Reentering; pointing inward.

(programming, of a mutex) Such that the corresponding lock can be reacquired by the locking thread.

(programming) That may be executed more than once at a time either by different threads, or because of recursion.

(aeronautics, of a part of a rocket) Designed to return to the Earth's atmosphere.

(physiology) Of or pertaining to reentry (in the heart);

(music, of a ukulele or similar instrument) Having the strings not ordered according to pitch (having a re-entry).