Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “re-”


prefix uk   /riː-/ /ri-/ /rɪ-/ us  
used to add the meaning 'do again', especially to verbs: rebuild remarry reusableRepeating an action returning something to its original state: reafforestation (= planting new trees in an area where they were previously cut down).Restoring and reviving
(Definition of re- prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of re-?
Add Cambridge dictionaries to your browser to your website

Definitions of “re-” in other dictionaries

Word of the Day

beer mat

a small piece of cardboard that you put under a glass to protect a table surface in a pub or bar

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More