3 definitions found From WordNet (r) 2.0 [wn]: postfix noun: an affix that is added at the end of the word [syn: {suffix}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Postfix \Post"fix\, noun; pl. {Postfixes}. [Pref. post- + -fix, as in prefix: cf. F. postfixe.] (Gram.) A letter, syllable, or word, added to the end of another word; a suffix. --Parkhurst. From The Collaborative International Dictionary of English v.0.44 [gcide]: Postfix \Post*fix"\, verb (used with an object) To annex; specifically (Gram.), to add or annex, as a letter, syllable, or word, to the end of another or principal word; to suffix. --Parkhurst.

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