un simultaneous

simultaneous

[sahy-muhl-tey-nee-uhs, sim-uhl-]
adjective
existing, occurring, or operating at the same time; concurrent: simultaneous movements; simultaneous translation.

Origin:
1650–60; < Latin simul together (see similar) + (instan)taneous

simultaneously, adverb
simultaneousness, simultaneity [sahy-muhl-tuh-nee-i-tee, sim-uhl-] , noun
nonsimultaneous, adjective
nonsimultaneously, adverb
unsimultaneous, adjective
unsimultaneously, adverb
unsimultaneousness, noun


synchronous, coincident.
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World English Dictionary
simultaneous (ˌsɪməlˈteɪnɪəs, US ˌsaɪməlˈteɪnɪəs)
 
adj
1.  occurring, existing, or operating at the same time; concurrent
 
n
2.  chess Sometimes shortened to: simul a display in which one player plays a number of opponents at once, walking from board to board
 
[C17: formed on the model of instantaneous from Latin simul at the same time, together]
 
simul'taneously
 
adv
 
simul'taneousness
 
n
 
simultaneity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

simultaneous
1650s, from L.L. simultaneus, from L. simul "at the same time" (see similar) + -taneous, abstracted from spontaneous, etc. Related: Simultaneously.
Online Etymology Dictionary, © 2010 Douglas Harper
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