prefix

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pre·fix / ˈprēˌfiks/ • n. a word, letter, or number placed before another: add the prefix 83 to the extension number. ∎  an element placed at the beginning of a word to adjust or qualify its meaning, e.g., ex-, non-, re- or (in some languages) as an inflection. ∎  a title placed before a name, e.g., Mr.• v. [tr.] add (something) at the beginning as a prefix or introduction: a preface is prefixed to the book. ∎  add a prefix or introduction to (something): all three-digit numbers will now be prefixed by 580.DERIVATIVES: pre·fix·a·tion / ˌprēfikˈsāshən/ n.

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