1669, "existing or happening at the same time," from L.L. synchronus "simultaneous," from Gk. synchronos "happening at the same time," from syn- "together" + khronos "time." Meaning "recurring at the same successive instants of time" is attested from 1677.
Pronunciation: /ˈsiŋ-krə-nəs, ˈsin-/ Function: adj 1: happening, existing, or arising at precisely the same time 2: recurring or operating at exactly the same periods 3: having the same period also: having the same period and phase syn·chro·nous·lyFunction: adv
operating system, communications 1. Two or more processes that depend upon the occurrences of specific events such as common timing signals. 2. Occurring at the same time or at the same rate or with a regular or predictable time relationship or sequence. Opposite: asynchronous. (1996-04-11)