airing cupboard
US /ˈerɪŋ ˌkʌbərd/
UK /ˈerɪŋ ˌkʌbərd/
1.
a warm cupboard, usually containing the hot water tank, used for airing laundry or storing linen
:
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Please put the clean towels in the airing cupboard.
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The sheets are still damp; I'll put them in the airing cupboard overnight.