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. préfix fixed beforehand, determined, préfixer to prefix. See Fix.]

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.

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

And now he hath to her prefixt a day.

Pre"fix (?), n. [Cf. F. préfixe.] 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.