Definition of drinking water noun from the Oxford Advanced Learner's Dictionary

 

drinking water

 noun
noun
BrE
 
; NAmE
 
[uncountable]
 
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water that is safe for drinking More Like This Compound nouns with –ing forms airing cupboard, answering machine, asking price, baking powder, betting shop, boarding school, booking office, bowling alley, breathing space, breeding ground, changing room, clotting factor, cutting room, draining board, drinking water, eating apple, housing estate, icing sugar, living room, meeting place, nursing home, punching bag, racing car, sleeping pill, starting point, tuning fork, waiting room, working partySee worksheet.
See the Oxford Advanced American Dictionary entry: drinking water