[kuh n-vur-zhuh n, -shuh n]


Nearby words

  1. conversationalist,
  2. conversazione,
  3. converse,
  4. converse, frederick shepherd,
  5. conversely,
  6. conversion disorder,
  7. conversion ratio,
  8. conversion table,
  9. conversive heat,
  10. conversus

Origin of conversion

1300–50; Middle English conversio(u)n (< Anglo-French) < Latin conversiōn- (stem of conversiō) a complete change. See converse2, -ion

Related formscon·ver·sion·al, con·ver·sion·ar·y [kuh n-vur-zhuh-ner-ee, -shuh-] /kənˈvɜr ʒəˌnɛr i, -ʃə-/, adjectivenon·con·ver·sion, nounpre·con·ver·sion, nounsem·i·con·ver·sion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for conversion

British Dictionary definitions for conversion



  1. a change or adaptation in form, character, or function
  2. something changed in one of these respects
a change to another attitude or belief, as in a change of religion
maths a change in the units or form of a number or expressionthe conversion of miles to kilometres involves multiplying by 1.61
logic a form of inference by which one proposition is obtained as the converse of another proposition
  1. unauthorized dealing with or the assumption of rights of ownership to another's personal property
  2. the changing of real property into personalty or personalty into realty
rugby a score made after a try by kicking the ball over the crossbar from a place kick
physics a change of fertile material to fissile material in a reactor
  1. an alteration to a car engine to improve its performance
  2. (as modifier)a conversion kit
material alteration to the structure or fittings of a building undergoing a change in function or legal status
NZ the unauthorized appropriation of a motor vehicle
Derived Formsconversional or conversionary, adjective

Word Origin for conversion

C14: from Latin conversiō a turning around; see convert

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 conversion



mid-14c., originally of religion, from French conversion, from Latin conversionem (nominative conversatio), noun of action from past participle stem of convertere (see convert (v.)). General sense of "transformation" is early 15c. Of buildings, from 1921. Conversion disorder "hysteria" (attested from 1946 but said to have been coined by Freud) was in DSM-IV (1994).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for conversion


[kən-vûrzhən, -shən]


The acquisition by bacteria of a new property associated with presence of a prophage.
A defense mechanism in which repressed ideas, conflicts, or impulses are manifested by various bodily symptoms, such as paralysis or breathing difficulties, that have no physical cause.
Related formscon•versive (-sĭv) adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.