re-entrant

adjective

1. 1

   Reentering; pointing inward.

2. 2

   (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.”

3. 3

   That 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.”

4. 4

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

5. 5

   Of or pertaining to reentry (in the heart)

6. 6

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