- occurring at the same time; coinciding in time; contemporaneous; simultaneous.
- going on at the same rate and exactly together; recurring together.
- Physics, Electricity. having the same frequency and zero phase difference.
- Computers, Telecommunications. of, relating to, or operating using fixed-time intervals controlled by a clock (opposed to asynchronous).
- Aerospace. geostationary.
Origin of synchronous
- occurring at the same time; contemporaneous
- physics (of periodic phenomena, such as voltages) having the same frequency and phase
- occurring or recurring exactly together and at the same ratethe synchronous flapping of a bird's wings
Word Origin for synchronous
Word Origin and History for nonsynchronous
1660s, "existing or happening at the same time," from Late Latin synchronus "simultaneous," from Greek synchronos "happening at the same time," from syn- "together" (see syn-) + khronos "time" (see chrono-). Meaning "recurring at the same successive instants of time" is attested from 1670s.
- Occurring or existing at the same time.