A restroom for girls.

A restroom for boys.

(sometimes capitalized) A room housing a pump, especially a room or structure at a spa where mineral water is drawn from a spring and consumed, formerly often serving as a venue for polite socializing and conversation.

storeroom in a house where odds and ends, especially furniture, can be stored

(chiefly US, euphemistic) Synonym of ladies' room: a public lavatory intended for women.

Synonym of cleanroom (“room or environment controlled to minimize the presence of airborne matter”)

A room that a business uses to pack items for subsequent storage or shipping. / A room in a large house that is used for storing unused items; storage room.

(UK) A room that was once common at larger railway stations in Britain and the British Commonwealth for the purpose of serving food and drink to travellers.

Synonym of presence chamber

Space in a public area, e.g. on public transport or at a sports or entertainment venue, for people to stand