English definition of “waste”
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.