D defs.my
Entry 4 senses Webster, 1913

Asynchronous

/ās'-ĭng'-krən-əs/ · A·syn·chro·nous · IPA /eɪˈsɪŋkɹənəs/
01 a. Not simultaneous; not concurrent in time; -- opposed to synchronous.
  1. 1.
    Not simultaneous; not concurrent in time; -- opposed to synchronous.
  2. 2.
    occurring in different geologic times; -- of taxa/(Paleontology)
  3. 3.
    chronologically misplaced; belonging to a different time or era
  4. 4.
    occurring at different speeds in different computers connected by a data transmission link; -- said of methods data of transmission between computers. Opposite of synchronous.(Computers)