- occurring at the same time; contemporaneous
- (of periodic phenomena, such as voltages) having the same frequency and phase
- occurring or recurring exactly together and at the same rate
WordReference Random House Learner's Dictionary of American English © 2026
syn•chro•nous /ˈsɪŋkrənəs/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2026- going on at the same rate and exactly together;
recurring together. - Aerospacegeostationary:a synchronous orbit.
syn•chro•nous
(sing′krə nəs),USA pronunciation adj.
syn′chro•nous•ly, adv.
syn′chro•nous•ness, n.
- occurring at the same time;
coinciding in time;
contemporaneous;
simultaneous. - going on at the same rate and exactly together;
recurring together. - Electricity, Physics[Physics, Elect.]having the same frequency and zero phase difference.
- Computing, Telecommunicationsof, pertaining to, or operating using fixed-time intervals controlled by a clock (opposed to asynchronous).
- Aerospacegeostationary.
- Greek sýnchronos, equivalent. to syn- syn- + chrón(os) time + -os adjective, adjectival suffix; see -ous
- Late Latin synchronus
- 1660–70
syn′chro•nous•ness, n.
Collins Concise English Dictionary © HarperCollins Publishers::
synchronous /ˈsɪŋkrənəs/ adj