noun

• (medicine) A unit for expressing the relative distance between genes on a chromosome.
• (countable) A unisex given name
• A male or female given name from Old Welsh Morcant, possibly from *mor (“sea”) (Welsh môr) or *mọr (“great”) (Old Welsh maur) + *kantos (“circle”) (Welsh cant), meaning “great chief” or “sea chief”.
• A male given name from Irish, an adopted anglicization of Murchadh (Murrough).
• (countable) A surname.
• A surname from Welsh [in turn originating as a patronymic].
• A surname from Irish [in turn originating as a patronymic], an anglicization of Morgán, itself from the Welsh name.
• A surname from Irish, a variant anglicization of Ó Muireagáin (Merrigan).
• A surname from Irish, an adopted anglicization of Ó Murcháin (Morahan).
• A placename.
• A town in South Australia, Australia; named for William Morgan, 14th Premier of South Australia.
• An unincorporated community in Ontario, Canada.
• A locale in the United States:
• A city, the county seat of Calhoun County, Georgia; named for county official Hiram Morgan.
• A city in Minnesota; named for anthropologist Lewis H. Morgan.
• A city in Texas.
• A city, the county seat of Morgan County, Utah; named for Mormon apostle Jedediah Morgan Grant.
• A town in Vermont; named for landowner John Morgan.
• A town in Oconto County, Wisconsin, and an unincorporated community within that town.
• A neighborhood of Sayreville borough, New Jersey; named for landowner Charles Morgan III.
• An unincorporated community in West Virginia.
• An unincorporated community in Shawano County, Wisconsin.
• A ghost town in California; named for early settler Charles Morgan.
• A number of townships in the United States, listed under Morgan Township.
• A horse of a compact breed from Vermont; named for Justin Morgan, owner of the stud from which the breed originated.
• A British sports car manufacturer; named for founder H. F. S. Morgan.
• (numismatic slang) A Morgan dollar.
• (Arthurian legend) Ellipsis of Morgan le Fay. [(Arthurian legend) The half sister of King Arthur, known for being a powerful enchantress.]