|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|1.||a. an enclosure or platform, usually surrounded by seats on all sides, in which sports events, contests, entertainments, etc, take place: a boxing arena|
|b. (as modifier): arena stage|
|2.||the central area of an ancient Roman amphitheatre, in which gladiatorial contests and other spectacles were held|
|3.||a sphere or scene of conflict or intense activity: the political arena|
|[C17: from Latin harēna sand, place where sand was strewn for the combats]|
arenan. [common; Unix] The area of memory attached to a process by `brk(2)' and `sbrk(2)' and used by `malloc(3)' as dynamic storage. So named from a `malloc: corrupt arena' message emitted when some early versions detected an impossible value in the free block list. See overrun screw, aliasing bug, memory leak, memory smash, smash the stack.