Pronunciation: (op"u-rā'shu-nl), [key]
1. able to function or be used; functional: How soon will the new factory be operational?
a. of, pertaining to, or involved in military operations.
b. on active service or combat duty: All units of the command are operational.
3. of or pertaining to operations or an operation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.