From Longman Dictionary of Contemporary Englishnightclothesnight‧clothes /ˈnaɪtkləʊðz, -kləʊz $ -kloʊ-/ noun [plural] DCCclothes that you wear in bed
Examples from the Corpus
nightclothes• Anna had also been arrested in her nightclothes and taken to the station.• She claims that Meryl was sitting on that window seat last night, wearing just her nightclothes.• The three people not in nightclothes.• For others the wearing of nightclothes may be contrary to their normal practice.• Then he bundled them into a stolen car in their nightclothes.• The other visitors were leaving last messages, and collecting used nightclothes in carrier bags.• Whilst in hospital patients are encouraged to wear nightclothes. 