Search Result for "asynchronous": 
Wordnet 3.0

ADJECTIVE (2)

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;

2. not synchronous; not occurring or existing at the same time or having the same period or phase;

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3 definitions retrieved:

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 synchronous. 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. [PJC]
WordNet (r) 3.0 (2006):

asynchronous 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: synchronous] 2: not synchronous; not occurring or existing at the same time or having the same period or phase [ant: synchronal, synchronic, synchronous]
The Free On-line Dictionary of Computing (18 March 2015):

asynchronous 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. (1995-12-08)