Definition of still room in English:

still room

noun

British
historical
  • A room in a large house used by the housekeeper for the storage of preserves, cakes, and liqueurs and the preparation of tea and coffee.

    • ‘British Acetones Toronto Ltd. adapted many of the storage and other buildings for the use of still rooms and it constructed a compressor house and an anti-freeze canning factory.’
    • ‘We worked under her during a great part of the day, either in the still room, or at our sewing in a chamber that opened out of the great hall.’

Origin

Early 18th century: a term used earlier for a room in a house where a still was kept for the distillation of perfumes and cordials.