A room in a home set aside for the use of visiting guests.(noun)
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Use "guest room" in a sentence
"As I made my way up to the Langes guest room and shut the door behind me, I realized that if I had been looking for an island fling, Upton would have been perfection."
"It took her down a peg. She started to stammer, but headed up to the guest room instead."
"Georgie was not home; our four youngest children were asleep in their rooms on the second floor; and Tom Devine, a friend visiting us from New York, was asleep in the guest room on the first floor, where our room was."