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From Old French convertir, from Latin converto (turn around)





convert (plural converts)

  1. A person who has converted to his or her religion.
    They were all converts to Islam.
  2. A person who is now in favour of something that he or she previously opposed or disliked.
    I never really liked broccoli before, but now that I've tasted it the way you cook it, I'm a convert!



convert (third-person singular simple present converts, present participle converting, simple past and past participle converted)

  1. (transitive) To transform or change (something) into another form, substance, state, or product.
    A kettle converts water into steam.
    • Thomas Burnet (1635?-1715)
      if the whole atmosphere were converted into water
    • John Milton (1608-1674)
      That still lessens / The sorrow, and converts it nigh to joy.
    • 2013 September-October, Katie L. Burke, “In the News”, American Scientist: 
      Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy.
  2. (transitive) To change (something) from one use, function, or purpose to another.
    He converted his garden into a tennis court.
    • 1907, Robert W. Chambers, chapter IX, The Younger Set:
      “A tight little craft,” was Austin’s invariable comment on the matron; and she looked it, always trim and trig and smooth of surface like a converted yacht cleared for action. ¶ Near her wandered her husband, orientally bland, invariably affable, [].
  3. (transitive) To induce (someone) to adopt a particular religion, faith, ideology or belief.
    They converted her to Roman Catholicism on her deathbed.
  4. (transitive) To exchange for something of equal value.
    We converted our pounds into euros.
  5. (transitive) To express (a quantity) in alternative units.
  6. (transitive) To express (a unit of measure) in terms of another; to furnish a mathematical formula by which a quantity, expressed in the former unit, may be given in the latter.
    How do you convert feet into metres?
  7. (transitive, law) To appropriate wrongfully or unlawfully; to commit the common law tort of conversion.
  8. (transitive, intransitive, rugby football) To score extra points after (a try) by completing a conversion.
    • 2011 February 4, Gareth Roberts, “Wales 19-26 England”, BBC:
      Flood converted to leave Wales with a 23-9 deficit going into the final quarter.
  9. (soccer) To score (a penalty).
    • 2011 September 28, Jon Smith, “Valencia 1-1 Chelsea”, BBC Sport:
      But, after the error by Lampard's replacement Kalou, Roberto Soldado converted the penalty.
  10. (intransitive, ten-pin bowling) To score a spare.
  11. (intransitive) To undergo a conversion of religion, faith or belief.
    We’ve converted to Methodism.
  12. (intransitive) To become converted.
    The chair converts into a bed.
  13. (transitive, obsolete) To cause to turn; to turn.
    • Ben Jonson (1572-1637)
      O, which way shall I first convert myself?
  14. (transitive, logic) To change (one proposition) into another, so that what was the subject of the first becomes the predicate of the second.
  15. (transitive, obsolete) To turn into another language; to translate.
    • Ben Jonson (1572-1637)
      which story [] Catullus more elegantly converted


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