Definition of "Ulster"

(geographical) The northern province of Ireland, made up of all six Northern Irish counties and three counties in the Republic of Ireland.  examples

(politics, proscribed) The six counties that make up Northern Ireland.  examples

(geographical) A county named after the Irish province in New York State: see Ulster County.  examples

A township in Floyd County, Iowa, United States.  examples

A town in Ulster County, New York, United States.  examples

A township in Bradford County, Pennsylvania, United States.  examples

Alternative letter-case form of ulster (“men's heavy overcoat”)  examples