simultaneous

[sahy-muhl-tey-nee-uhs, sim-uhl-]
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Origin of simultaneous

1650–60; < Latin simul together (see similar) + (instan)taneous
Related formssi·mul·ta·ne·ous·ly, adverbsi·mul·ta·ne·ous·ness, si·mul·ta·ne·i·ty [sahy-muhl-tuh-nee-i-tee, sim-uhl-] /ˌsaɪ məl təˈni ɪ ti, ˌsɪm əl-/, nounnon·si·mul·ta·ne·ous, adjectivenon·si·mul·ta·ne·ous·ly, adverbun·si·mul·ta·ne·ous, adjectiveun·si·mul·ta·ne·ous·ly, adverbun·si·mul·ta·ne·ous·ness, noun

Synonyms for simultaneous

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for simultaneity

unanimity, synchronism, synchroneity, simultaneity

Examples from the Web for simultaneity

Historical Examples of simultaneity


British Dictionary definitions for simultaneity

simultaneous

adjective
  1. occurring, existing, or operating at the same time; concurrent
noun
  1. chess a display in which one player plays a number of opponents at once, walking from board to boardSometimes shortened to: simul
Derived Formssimultaneously, adverbsimultaneousness or simultaneity (ˌsɪməltəˈniːɪtɪ, US ˌsaɪməltəˈniːɪtɪ), noun

Word Origin for simultaneous

C17: formed on the model of instantaneous from Latin simul at the same time, together
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for simultaneity
n.

1650s, from simultaneous + -ity.

simultaneous

adj.

1650s, from Medieval Latin simultaneus, perhaps from simultim "at the same time," extended from Latin simul "at the same time" (see similar (adj.)), or from simul with ending abstracted from Late Latin spontaneus, where the -t- is organic. Related: Simultaneously.

Online Etymology Dictionary, © 2010 Douglas Harper