Asynchronous refers to data being sent in various chunks or sent only from one end. Not all at the same time or not from both ends at once. (Conversations are synchronous. Text messages are asynchronous.) And just to state the obvious, synchronization here refers to data being the same in both places. Asynchronous is the opposite of synchronous. It's not related to synchronized or synchronization in this sense.
5/22/13 at 8:00am