Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “unfasten”

unfasten

verb [I or T]     /ʌnˈfɑː.sən/ US  /-ˈfæs-/
to release or open something that is fixed or closed: I can't unfasten this button/belt. This blouse unfastens (= can be unfastened) at the back.Unfastening and opening
(Definition of unfasten verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of unfasten

Definitions of “unfasten” in other dictionaries

Word of the Day

limber up

to do gentle exercises to stretch the muscles in order to prepare the body for more active physical exercise

Word of the Day

Blog

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