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asynchronous

[ey-sing-kruh-nuh s] /eɪˈsɪŋ krə nəs/
adjective
1.
not occurring at the same time.
2.
(of a computer or other electrical machine) having each operation started only after the preceding operation is completed.
3.
Computers, Telecommunications. of or relating to operation without the use of fixed time intervals (opposed to synchronous).
Origin of asynchronous
1740-1750
First recorded in 1740-50; a-6 + synchronous
Related forms
asynchronously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for asynchronous
adj.

1748, from a-, privative prefix, + synchronous.

Online Etymology Dictionary, © 2010 Douglas Harper
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