A Prefix

1. Something placed before another
   1. (grammar, linguistic morphology) A morpheme added to the beginning of a word to modify its meaning, for example as, pre- in prefix, con- in conjure, re- in reheat, etc.Synonyms: foresyllable (rare), prefixum (archaic)Antonym: suffixHypernym: affix (broad sense)
   2. (telecommunications) A set of digits placed before a telephone number, to indicate where the number is based, what type of phone number it is (landline, mobile, toll-free, premium rate etc.)
   3. A title added to a person's name, such as Mr. or Dr.
   4. (computing) An initial segment of a string of characters.

Usage notes

• Though much less common, a plural form prefices is seen as well, apparently formed by analogy with index–indices, appendix–appendices, and so on, but it is not a standard plural and has no basis in Latin.

Synonyms

• forefix (rare)