ETYM Greek; syn with + kronos time. Related to Chronicle.
1. Occurring or existing at the same time or having the same period or phase; SYN. synchronal, synchronic.
2. (Digital communication) Pertaining to a transmission technique that requires a common clock signal (a timing reference) between the communicating devices in order to coordinate their transmissions.
3. Pertaining to or happening at same time.
4. Regular. Most communication within a computer system is synchronous, controlled by the computer's own internal clock, while communication between computers is usually asynchronous. Synchronous telecommunications are, however, becoming more widely used.