Definition of still room in English:

still room

noun

historicalBritish
  • 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.