verb (used without object), co·in·cid·ed, co·in·cid·ing.

to occupy the same place in space, the same point or period in time, or the same relative position: The centers of concentric circles coincide. Our vacations coincided this year.
to correspond exactly, as in nature, character, etc.: His vocation coincides with his avocation.
to agree or concur, as in thought or opinion: Their opinions always coincide.

Origin of coincide

1635–45; < Medieval Latin coincidere, equivalent to Latin co- co- + incidere to befall; see incident
Related formsun·co·in·cid·ed, adjectiveun·co·in·cid·ing, adjective

Synonyms for coincide

Antonyms for coincide Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for coincide

Contemporary Examples of coincide

Historical Examples of coincide

  • In other words, the axes of figure of the two surfaces must coincide.

    On Laboratory Arts

    Richard Threlfall

  • To begin with, it does not coincide in point of time with the tide inshore.

    From a Cornish Window

    Arthur Thomas Quiller-Couch

  • He began to suspect, now, that the welfare of others can often coincide with one's own.

    The Pirates of Ersatz

    Murray Leinster

  • She had her own views in the matter, and they did not in the least coincide with Susan's.

    Marjorie Dean

    Pauline Lester

  • I have made these remarks in the hope that you will coincide.

British Dictionary definitions for coincide


verb (intr)

to occur or exist simultaneously
to be identical in nature, character, etc
to agree

Word Origin for coincide

C18: from Medieval Latin coincidere, from Latin co- together + incidere to occur, befall, from cadere to fall
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 coincide

1715, from French coincider (14c.), from Medieval Latin coincidere (in astrological use), literally "to fall upon together," from Latin com- "together" (see co-) + incidere "to fall upon" (in- "upon + cadere "to fall;" see case (n.1)). Related: Coincided; coinciding.

Online Etymology Dictionary, © 2010 Douglas Harper