UtahPronunciation: /ˈjuːtɔː, -tɑː/Definition of Utah a state in the western US; population 2,736,424 (est. 2008); capital, Salt Lake City. The region became part of Mexico in 1821 and was ceded to the US in 1848, becoming the 45th state of the US in 1896. Derivatives UtahanPronunciation: /juːˈtɔːən, -ˈtɑːən/ adjective & noun Utah in other Oxford dictionaries Definition of Utah in the US English dictionary