1. occurring or existing at the same time or having the same period or phase

- recovery was synchronous with therapy

- a synchronous set of clocks

- the synchronous action of a bird's wings in flight

Similar word(s): synchronic, coetaneous, coeval, contemporaneous, coexistent, coexisting, coincident, coincidental, coinciding, concurrent, cooccurring, simultaneous, contemporary, parallel, synchronic, synchronised, synchronized, 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