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.]
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   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.
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   2. To set or appoint beforehand; to settle or establish
      antecedently. [Obs.] " Prefixed bounds. " --Locke.
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            And now he hath to her prefixt a day. --Spenser.
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