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

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

A township in Floyd County, Iowa, United States.

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

A township in Bradford County, Pennsylvania, United States.

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

(clothing, men's attire) A long, loose overcoat made of wool or other rough material, often called a greatcoat, which sometimes features an attached shoulder cape covering the back and sleeves, and which can sometimes be buttoned in front.