[syn.chro.nous] adj [LL synchronos, fr. Gk, fr. syn- + chronos time] (1669) 1: happening, existing, or arising at precisely the same time
2: recurring or operating at exactly the same periods
3: involving or indicating synchronism
4. a: having the same period; also: having the same period and phase b: geostationary
5: of, used in, or being digital communication (as between computers) in which a common timing signal is established that dictates when individual bits can be transmitted, in which characters are not individually delimited, and which allows for very high rates of data transfer syn see contemporary -- syn.chro.nous.ly adv -- syn.chro.nous.ness n