Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “slack”

slack

adjective (NOT TIGHT)    /slæk/
not tight; loose: These tent ropes are too slack - they need tightening.Flexible, loose and yielding slackly     /ˈslæk.li/ adverb
(Definition of slack adjective (NOT TIGHT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of slack

Browse related topics

You are looking at an entry to do with Flexible, loose and yielding, but you might be interested in these topics from the Weight and firmness topic area:

Definitions of “slack” in other dictionaries

Word of the Day

handout

a document given to students or reporters which contains information about a particular subject

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