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waste

 
 
/weɪst/ noun

Definition

BAD USE [U, no plural] a bad use of something useful, such as time or money, when there is a limited amount of it: Meetings are awaste of time. They throw away loads of food - it's such a waste. a waste of energy/resources
REMAINING MATERIAL [U] things that are not wanted, especially what remains after you have used something: household/nuclear waste
go to waste to not be used: I hate to see good food go to waste.
(Definition of waste noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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