uˈtility ˌroom noun [countable] a room in a house where washing machines,
freezers etc are kept
[TahlilGaran] Dictionary of Contemporary English ▲
utility room n. A room in a house or building for machinery and other things important in the daily use of the building and the work of the people in it.
There is a utility room upstairs where Mother does the laundry. The oil burner is kept in the utility room in the basement. [TahlilGaran] English Idioms Dictionary ▲