Homeless: A person sleeping in a place not meant for human habitation (e.g. living on the streets, for example) OR living in a homeless emergency shelter. -US Department of Housing and Urban Development

Chronically Homeless: Either (1) an unaccompanied homeless individual with a disabling condition who has been continuously homeless for a year or more, OR (2) an unaccompanied individual with a disabling condition who has had at least four episodes of homelessness in the past three years. -US Department of Housing and Urban Development

Disabling Condition: A diagnosable substance use disorder, serious mental illness, developmental disability, or chronic physical illness or disability, including the co-occurrence of two or more of these conditions. -US Department of Housing and Urban Development