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men's room

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noun
  1. a public lavatory for men.

Origin of men's room

An Americanism dating back to 1925–30
Also called men's lounge.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for men's room

men's room

noun
  1. mainly US and Canadian a public lavatory for men
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012