[ koh-heer-uhnt, -her- ]
See synonyms for coherent on
  1. logically connected; consistent: a coherent argument.

  2. having a natural or due agreement of parts; harmonious: a coherent design.

  1. cohering; sticking together: a coherent mass of sticky candies.

  2. Physics, Optics. of or relating to waves that maintain a fixed phase relationship, as in coherent light, or light in which the electromagnetic waves maintain a fixed and predictable phase relationship with each other over a period of time.: See also laser.

Origin of coherent

First recorded in 1570–80; from Medieval Latin cohērent-, variant of Latin cohaerent- (stem of cohaerēns ), present participle of cohaerēre; see cohere, -ent

Other words from coherent

  • co·her·ent·ly, adverb
  • non·co·her·ent, adjective

Words Nearby coherent Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use coherent in a sentence

British Dictionary definitions for coherent


/ (kəʊˈhɪərənt) /

  1. capable of logical and consistent speech, thought, etc

  2. logical; consistent and orderly

  1. cohering or sticking together

  2. physics (of two or more waves) having the same phase or a fixed phase difference: coherent light

  3. (of a system of units) consisting only of units the quotient or product of any two of which yield the unit of the resultant quantity

Derived forms of coherent

  • coherently, adverb

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