1. a striking occurrence of two or more events at one time apparently by mere chance: Our meeting in Venice was pure coincidence.
  2. the condition or fact of coinciding.
  3. an instance of this.

Origin of coincidence

First recorded in 1595–1605; coincid(ent) + -ence
Related formsnon·co·in·ci·dence, nounpre·co·in·ci·dence, nounsu·per·co·in·ci·dence, noun

Synonyms for coincidence Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for non-coincidence


  1. a chance occurrence of events remarkable either for being simultaneous or for apparently being connected
  2. the fact, condition, or state of coinciding
  3. (modifier) electronics of or relating to a circuit that produces an output pulse only when both its input terminals receive pulses within a specified intervalcoincidence gate Compare anticoincidence
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 non-coincidence



c.1600, "exact correspondence," from French coincidence, from coincider (see coincide). Meaning "a concurrence of events with no apparent connection" is from 1680s.

Online Etymology Dictionary, © 2010 Douglas Harper