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Definition of prefix noun from the Oxford Advanced Learner's Dictionary

     

    prefix

     noun
    noun
    BrE BrE//ˈpriːfɪks//
     
    ; NAmE NAmE//ˈpriːfɪks//
     
    Names, Grammar
     
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  1. 1 (grammar) a letter or group of letters added to the beginning of a word to change its meaning, such as un- in unhappy and pre- in preheat negative prefixes such as ‘un-’ and ‘dis-’ compare affix, suffix See related entries: Grammar
  2. 2a word, letter or number that is put before another Car insurance policies have the prefix MC (for motor car).
  3. 3(old-fashioned) a title such as Dr or Mrs used before a person’s name See related entries: Names
  4. Word Origin mid 16th cent. (as a verb): from Old French prefixer, from Latin praefixus ‘fixed in front’, from the verb praefigere, from prae ‘before’ + figere ‘to fix’. The noun is from modern Latin praefixum, neuter (used as a noun) of praefixus, and dates from the mid 17th cent.
See the Oxford Advanced American Dictionary entry: prefix

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