deallocate

Etymology

de- + allocate

verb

1. (transitive) To remove from the set of resources put aside for (allocated to) a particular user or purpose.
   Empty out your locker; it will be deallocated at the end of the day.
2. (transitive, computing) To return previously allocated memory.
   Computer programs should deallocate memory they no longer need, releasing it back to the system.
   Similarly, the program deallocates storage for automatic objects when the procedure returns to its caller. 2010, Randall Hyde, The Art of Assembly Language, 2nd edition, No Starch Press, page 267