Pronunciation: (ā-sing'kru-nus), [key]
1. not occurring at the same time.
2. (of a computer or other electrical machine) having each operation started only after the preceding operation is completed.
3. Computers, Telecommunications.of or pertaining to operation without the use of fixed time intervals (opposed to synchronous).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.