Definitions for "Synchronous communication"
Fixed-rate serial communication, eliminating the need for transmitting inefficient start-stop information. PC-to-mainframe communication may be synchronous; most PC-to-PC communication is asynchronous. Most laptop modems are asynchronous only. If you're not sure whether you need a synchronous-asynchronous modem, you probably don't.
Electronic communication that takes place in real time but in different locations, and frequently used in relation to learning by the internet in a virtual classroom. See also Asynchronous communication
Communication that occurs in real time between participants who may or may not be in the same location. Contrasted with asynchronous communication.
A form of transmitting information that takes place simultaneously, as in a telephone conversation.