[kuh-lizh-uh n]


the act of colliding; a coming violently into contact; crash: the collision of two airplanes.
a clash; conflict: a collision of purposes.
Physics. the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum.

Origin of collision

1400–50; late Middle English < Late Latin collīsiōn- (stem of collīsiō), equivalent to collīs(us) (past participle of collīdere to collide) + -iōn- -ion
Related formscol·li·sion·al, adjectivean·ti·col·li·sion, adjective
Can be confusedcollision collusion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for collision



a violent impact of moving objects; crash
the conflict of opposed ideas, wishes, attitudes, etca collision of interests
physics an event in which two or more bodies or particles come together with a resulting change of direction and, normally, energy

Word Origin for collision

C15: from Late Latin collīsiō from Latin collīdere to collide
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 collision

early 15c., from Middle French collision (15c.), from Latin collisionem (nominative collisio) "a dashing together," noun of action from collidere (see collide).

Online Etymology Dictionary, © 2010 Douglas Harper