The difference between Ladies' room and Waiting room
When used as nouns, ladies' room means a waiting room in a railway station or other public building intended exclusively for women and usually including a separate women's lavatory, whereas waiting room means a room in some public place for people to wait.
check bellow for the other definitions of Ladies' room and Waiting room
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Ladies' room as a noun:
A room belonging to some or all women, particularly: A waiting room in a railway station or other public building intended exclusively for women and usually including a separate women's lavatory. A public lavatory intended for use by women.
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Waiting room as a noun:
a room in some public place for people to wait
Examples:
"hyponyms ladies' room women's room q2=for women, historicagentlemen's room q3=for men, historical"