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]

The Free On-line Dictionary of Computing (19 January 2023):

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)