[ uhn-kuh n-fawr-mi-tee ]
/ ˌʌn kənˈfɔr mɪ ti /

noun, plural un·con·form·i·ties.

lack of conformity; incongruity; inconsistency.
  1. a discontinuity in rock sequence indicating interruption of sedimentation, commonly accompanied by erosion of rocks below the break.
  2. the interface between such strata.

Nearby words

  1. unconditioned response,
  2. unconditioned stimulus,
  3. unconfined,
  4. unconfirmed,
  5. unconformable,
  6. uncongenial,
  7. unconnected,
  8. unconquerable,
  9. unconscionable,
  10. unconscious

Origin of unconformity

First recorded in 1590–1600; un-1 + conformity

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unconformity

British Dictionary definitions for unconformity


/ (ˌʌnkənˈfɔːmɪtɪ) /

noun plural -ties

lack of conformity
the contact surface between younger and older rocks representing a discontinuity in the geological record. Most commonly it represents an erosional surface
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 unconformity



c.1600, from un- (1) "not" + conformity. Geological sense is from 1829.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for unconformity


[ ŭn′kən-fôrmĭ-tē ]

A surface between successive strata representing a missing interval in the geologic record of time, produced either by an interruption in deposition or by the erosion of depositionally continuous strata followed by renewed deposition. An unconformity is a type of discontinuity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.