NOUN (1)

1. an affix that is added in front of the word;


VERB (1)

1. attach a prefix to;
- Example: "prefixed words"

The Collaborative International Dictionary of English v.0.48:

Prefix \Pre*fix"\, v. t. [imp. & p. p. Prefixed; p. pr. & vb.
   n. Prefixing.] [L. praefixus, p. p. of praefigere to fix or
   fasten before; prae before + figere to fix: cf. F. pr['e]fix
   fixed beforehand, determined, pr['e]fixer to prefix. See
   Fix.]
   [1913 Webster]
   1. To put or fix before, or at the beginning of, another
      thing; as, to prefix a syllable to a word, or a condition
      to an agreement.
      [1913 Webster]

   2. To set or appoint beforehand; to settle or establish
      antecedently. [Obs.] " Prefixed bounds. " --Locke.
      [1913 Webster]

            And now he hath to her prefixt a day. --Spenser.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prefix \Pre"fix\, n. [Cf. F. pr['e]fixe.]
   That which is prefixed; esp., one or more letters or
   syllables combined or united with the beginning of a word to
   modify its signification; as, pre- in prefix, con- in
   conjure.
   [1913 Webster]

WordNet (r) 3.0 (2006):

prefix
    n 1: an affix that is added in front of the word
    v 1: attach a prefix to; "prefixed words" [ant: suffix]

Moby Thesaurus II by Grady Ward, 1.0:

137 Moby Thesaurus words for "prefix":
   IC analysis, accidence, add, adjoin, affix, affixation,
   agglutinate, allomorph, allonge, annex, anteriority, append,
   appendix, attach, avant-propos, bold front, bound morpheme,
   brave face, brave front, breakthrough, burden, coda, codicil,
   commentary, complicate, conjoin, conjugation, cutting, declension,
   decorate, derivation, difference of form, display, enclitic,
   encumber, envoi, epilogue, exordium, facade, face, facet, facia,
   fore, forefront, foreground, forehand, foreland, forepart,
   forequarter, foreside, foreword, formative, free form, front,
   front elevation, front man, front matter, front page, front view,
   frontage, frontal, frontier, frontispiece, glue on, head, heading,
   hitch on, immediate constituent analysis, infix, infixation,
   inflection, innovation, interlineation, interpolation, introduce,
   introduction, join with, lap, leap, marginalia, morph, morpheme,
   morphemic analysis, morphemics, morphology, morphophonemics, note,
   obverse, ornament, overture, paradigm, paste on, plus, postfix,
   postscript, postulate, preamble, preface, prefixation, prefixture,
   preliminary, prelude, premise, presupposition, priority, proclitic,
   proem, prolegomena, prolegomenon, prolepsis, prologize, prologue,
   proscenium, protasis, put with, radical, rider, root, saddle with,
   scholia, slap on, stem, subjoin, suffix, suffixation, superadd,
   superpose, tack on, tag, tag on, tail, theme, unite with, verse,
   voluntary, window dressing, word-formation



The Free On-line Dictionary of Computing (30 December 2018):

prefix
atto-
exa-
femto-
giga-
kilo-
mega-
micro-
milli-
peta-
pico-
tera-
yocto-
yotta-
zepto
zetta-

   1.  An SI prefix used to multiply the value of an SI
   (Système International) unit by some power of ten.

   2.  In mathematics or programming, a
   prefix operator is one that is written before its operand.  In
   a programming language using prefix notation, all operators
   are prefix operators.

   (2014-07-08)