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3 definitions found
 for asynchronous
From The Collaborative International Dictionary of English v.0.48 :

  Asynchronous \A*syn"chro*nous\, a. [Gr. ? not + synchronous.]
     Not simultaneous; not concurrent in time; -- opposed to
     Syn: nonsynchronous, unsynchronized, unsynchronous.
          [Webster 1913 Suppl.]
     2. (Paleontology) occurring in different geologic times; --
        of taxa/ synchronous
     Syn: allochronic
          [WordNet 1.5 +PJC]
     3. chronologically misplaced; belonging to a different time
        or era
     Syn: anachronic, anachronous, anachronistic
          [WordNet 1.5 +PJC]
     4. (Computers) occurring at different speeds in different
        computers connected by a data transmission link; -- said
        of methods data of transmission between computers.
        Opposite of synchronous.

From WordNet (r) 3.0 (2006) :

      adj 1: (digital communication) pertaining to a transmission
             technique that does not require a common clock between
             the communicating devices; timing signals are derived
             from special characters in the data stream itself [ant:
      2: not synchronous; not occurring or existing at the same time
         or having the same period or phase [ant: synchronal,
         synchronic, synchronous]

From The Free On-line Dictionary of Computing (30 December 2018) :

      Not synchronised by a shared signal such as
     clock or semaphore, proceeding independently.
     Opposite: synchronous.
     1.  A process in a multitasking system
     whose execution can proceed independently, "in the
     background".  Other processes may be started before the
     asynchronous process has finished.
     2.  A communications system in which data
     transmission may start at any time and is indicated by a
     start bit, e.g. EIA-232.  A data byte (or other element
     defined by the protocol) ends with a stop bit.  A
     continuous marking condition (identical to stop bits but not
     quantized in time), is then maintained until data resumes.

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