Definition of cloakroom noun from the Oxford Advanced Learner's Dictionary
cloakroom
noun
ˈkləʊkruːm ˈkloʊkruːm
ˈkləʊkrʊm ˈkloʊkrʊm
1(especially British English) (North American English usuallycheckroom, coat check, coatroom)a room in a public building where people can leave coats, bags, etc. for a time2(British English) a room that contains a toilet or toiletsthe ladies' cloakroom
Usage note: toilet / bathroomIn British English, but not in North American English, the room that has a toilet in it is usually referred to as a toilet. This room in people’s houses can also be called the lavatory, or informally, the loo. An extra downstairs toilet in a house can be called the cloakroom. In public places, especially on signs, the words toilets, Gents (for men’s toilets) or Ladies (for women’s toilets) are used for a room or small building containing several toilets. You might also see WC or Public Conveniences on some signs.In North American English the room that contains a toilet is usually called the bathroom, never the toilet. A room with a toilet in a public place can also be called a restroom, ladies’ room, women’s room or men’s room. Washroom is also used, especially in Canada.
ˈkləʊkruːm 
ˈkloʊkruːm 
Usage note: toilet / bathroomIn British English, but not in North American English, the room that has a toilet in it is usually referred to as a toilet. This room in people’s houses can also be called the lavatory, or informally, the loo. An extra downstairs toilet in a house can be called the cloakroom. In public places, especially on signs, the words toilets, Gents (for men’s toilets) or Ladies (for women’s toilets) are used for a room or small building containing several toilets. You might also see WC or Public Conveniences on some signs.In North American English the room that contains a toilet is usually called the bathroom, never the toilet. A room with a toilet in a public place can also be called a restroom, ladies’ room, women’s room or men’s room. Washroom is also used, especially in Canada.