noun

• A habitational surname from Old English.
• The House of Lancaster, a dynasty of English kings and one of the opposing factions involved in the 15th century Wars of the Roses. The name comes from the fact that its members were descended from John of Gaunt, 1st Duke of Lancaster; their symbol was a red rose.
• A city in Lancashire, in north-west England (OS grid ref SD4761).
• The City of Lancaster, a local government district with city status in Lancashire in North West England. Its main settlement is Lancaster, from which it obtained its city status.
• A locality in the Shire of Campaspe and the City of Greater Shepparton, Victoria, Australia.
• Several places in Canada:
• A small former city in New Brunswick, Canada, amalgamated into Saint John in 1967.
• A ghost town in Newfoundland and Labrador, Canada.
• A community in the township of South Glengarry, in eastern Ontario, Canada.
• A small community in the city of St. Catharines, Ontario, Canada.
• Several places in the United States:
• A locality in Yavapai County, Arizona.
• A ghost town in Crawford County, Arkansas.
• A charter city in Los Angeles County, California.
• An unincorporated community in Wabash County, Illinois.
• An unincorporated community in Lancaster Township, Huntington County, Indiana.
• An unincorporated community in Lancaster Township, Jefferson County, Indiana.
• Another name for Patricksburg, an unincorporated community in Marion Township, Owen County, Indiana.
• A tiny city in Atchison County, Kansas.
• A small city, the county seat of Garrard County, Kentucky.
• A town in Worcester County, Massachusetts.
• A tiny city in Kittson County, Minnesota.
• A small city, the county seat of Schuyler County, Missouri.
• A town, the county seat of Coos County, New Hampshire.
• A census-designated place in Coos County, New Hampshire, within the town of the same name.
• A town and village in Erie County, New York; suburb of Buffalo.
• A city, the county seat of Fairfield County, Ohio.
• An unincorporated community in Lane County, Oregon.
• A city, the county seat of Lancaster County, Pennsylvania.
• A city, the county seat of Lancaster County, South Carolina.
• An unincorporated community in Smith County, Tennessee.
• A city in Dallas County, Texas.
• An unincorporated community, the county seat of Lancaster County, Virginia.
• A city, the county seat of Grant County, Wisconsin.
• A number of townships in the United States, listed under Lancaster Township.
• (aircraft) A type of four-engined British bomber aircraft built by Avro during World War 2.