Definition from Wiktionary, the free dictionary
Originally a clipped form of gentlemen's room, originally a separate waiting room for men in public buildings such as railway stations but by the appearance of men's room also used as a euphemism for men's lavatories.
- A lavatory intended for use by men, often including urinals in addition to toilets.
- Other rooms intended for use by men, as waiting rooms, dressing rooms, locker rooms, etc.
lavatory intended for men — See also translations at toilet
other rooms intended for men
- "man, n.¹ (and int.)" in the Oxford English Dictionary (2000), Oxford: Oxford University Press.