Homelessness refers to the condition and societal category of people who lack fixed housing, specifically a fixed, regular, and adequate nighttime residence. The definition also includes a person who has a primary nighttime residence that is in transitional housing or a person who spends most nights in a supervised public or private facility such as welfare hotels, congregate shelters, and transitional housing for the mentally ill, or in an institution that provides a temporary residence for individuals intended to be institutionalized, or in a public or private place not designed for, or ordinarily used as, a regular sleeping accommodation for human beings. Office of Applied Studies, United States Department of Health and Human Services,http://oas.samhsa.gov/MentalHealthHP2010/terminology.htm "Terminology"http://www.law.cornell.edu/uscode/html/uscode42/usc_sec_42_00011302----000-.html United States Code, Title 42, Chapter 119, Subchapter I, § 11302.