præfix

Noun

prefix (plural prefixes)

1. 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.
   • The chosen prefixes won the vote in part because they start with the only two letters left in the alphabet that are not already used in measurement. The b for “bronto” is already used for bytes and h for “hella” is used for hecto, the prefix for 100.2022 November 18, Ian Sample, “Earth weighs in at six ronnagrams as new prefixes picked for big and small”, in The Guardian

   Synonyms:

   forefix, prefixum

   Antonyms:

   suffix

2. 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.)
   • in the UK, a number with an 0800 prefix is a toll-free number.
3. A title added to a person's name, such as Mr. or Dr.
4. An initial segment of a string of characters.
   • The string "abra" is both a prefix and a suffix of the string "abracadabra".

See all 6 meanings of prefix