Utah Usual and Ordinary Meanings Instruction (OMI) is an instruction issued by the Utah Supreme Court that outlines the meanings of words and phrases used in Utah case law and statutes. The instruction is designed to ensure that the words and phrases used in the law have the same meaning for all parties involved. There are three types of OMI: Descriptive, Prescriptive, and Exclusionary. Descriptive OMI are definitions of terms as they are used in Utah case law and statutes. Prescriptive OMI are rules of construction for interpreting words and phrases used in Utah case law and statutes. Exclusionary OMI are definitions of words and phrases that are excluded from the definition of the word or phrase in Utah case law and statutes.