coincidental

[koh-in-si-den-tl]

adjective

happening by or resulting from coincidence; by chance: a coincidental meeting.
existing or occurring at the same time.

Origin of coincidental

First recorded in 1790–1800; coincident + -al¹

Related formsco·in·ci·den·tal·ly, co·in·ci·dent·ly

[koh-in-si-duh nt-lee] /koʊˈɪn sɪ dənt li/, adverbnon·co·in·ci·den·tal, adjectivenon·co·in·ci·den·tal·ly, adverbun·co·in·ci·den·tal, adjectiveun·co·in·ci·den·tal·ly, adverb

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British Dictionary definitions for uncoincidentally

coincidental

adjective

of or happening by a coincidence; fortuitous

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 uncoincidentally

coincidental

adj.

c.1800, from coincident + -al (1).