Prefix

·vt To set or appoint beforehand; to settle or establish antecedently.

II. Prefix ·vt 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.

III. Prefix ·noun 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.