noun

• A secluded and narrow valley, especially one with a river running through it; a depression between hills; a dale.
• A Scottish habitational surname from Scottish Gaelic for someone who lives in a valley.
• A male given name transferred from the surname.
• A river in England, mainly in Lincolnshire.
• A village in northern County Donegal, Ireland; in Irish An Gleann from gleann (“glen”).
• A number of places in the United States:
• A town in Alcorn County, Mississippi.
• A census-designated place in Beaverhead County, Montana.
• An unincorporated community in Sioux County, Nebraska, situated in a glen.
• An unincorporated community in Bartlett, Carroll County, New Hampshire.
• A town in Montgomery County, New York, named after Jacob Glen.
• Short for Glen of Imaal Terrier. [A kind of terrier originating from the Glen of Imaal in County Wicklow, Ireland.]