Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “prefix”

See all translations

prefix

noun [C] uk   /ˈpriː.fɪks/ us  

prefix noun [C] (GRAMMAR)

B2 language a letter or group of letters added to the beginning of a word to make a new word: In the word "unimportant", "un-" is a prefix.
See also
More examples

prefix noun [C] (PHONE)

UK internet & telecoms a dialling code
Grammar
Translations of “prefix”
in Korean 접두사…
in Arabic بادِئة…
in French préfixe…
in Turkish ön ek…
in Italian prefisso…
in Chinese (Traditional) 文法, 前綴…
in Russian приставка (в грамматике)…
in Polish przedrostek…
in Spanish prefijo…
in Portuguese prefixo…
in German das Präfix…
in Catalan prefix…
in Japanese (文法)接頭辞(un- や dis- など)…
in Chinese (Simplified) 语法, 前缀…
(Definition of prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of prefix?
Add Cambridge dictionaries to your browser to your website

Definitions of “prefix” in other dictionaries

Word of the Day

christmassy

typical of Christmas, or happy because it is Christmas

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More