n.; 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. [ 1913 Webster ]
v. t. 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. [ 1913 Webster ]
(n) a parenthesis-free notation for forming mathematical expressions in which each operator follows its operands, Syn. suffix notation, reverse Polish notation