Adjective
1. occurring or existing at the same time or having the same period or phase;
"recovery was synchronous with therapy"- Jour.A.M.A."a synchronous set of clocks""the synchronous action of a bird's wings in flight""synchronous oscillations"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