Definition from macmillandictionary.com
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All this uneaten food – what a waste!
a campaign to increase efficiency and reduce waste in government departments
a waste of young talent
There was growing opposition to the war and its senseless waste of life.
The cherries will just go to waste if we don’t pick them soon.
It’s a waste of time trying to get her to change her mind.
They said a public enquiry would just be a waste of taxpayers’ money.
A bill was introduced to clean up toxic wastes from local factories.
a controversy over the storage of nuclear waste
human waste (=substances that your body gets rid of when you go to the toilet)
The process recycles domestic waste to produce fertilizer.
the desert’s sandy wastes