si·mul·ta·ne·ous

[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

si·mul·ta·ne·ous·ly, adverb
si·mul·ta·ne·ous·ness, si·mul·ta·ne·i·ty [sahy-muhl-tuh-nee-i-tee, sim-uhl-] , noun
non·si·mul·ta·ne·ous, adjective
non·si·mul·ta·ne·ous·ly, adverb
un·si·mul·ta·ne·ous, adjective
un·si·mul·ta·ne·ous·ly, adverb
un·si·mul·ta·ne·ous·ness, noun


synchronous, coincident.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To simultaneously
00:10
Simultaneously is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a scrap or morsel of food left at a meal.
Collins
World English Dictionary
simultaneous (ˌsɪməlˈteɪnɪəs, US ˌsaɪməlˈteɪnɪəs) [Click for IPA pronunciation guide]
 
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

simultaneous (ˌsɪməlˈteɪnɪəs, US ˌsaɪməlˈteɪnɪəs) [Click for IPA pronunciation guide]
 
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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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
Cite This Source
Example sentences
He simultaneously rebuffs and courts interpretation.
In a sense, these creative folks were simultaneously able to live in a dream
  state while concentrating on the outside world.
Unfortunately, running more than a handful of these widgets simultaneously
  proves problematic.
Equally important, they could be packed into arrays capable of monitoring
  thousands of stars simultaneously.
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