/ Dictionary / Index M MacArthur: Meaning and Definition of Find definitions for: Mac•Ar•thur Pronunciation: (muk-är'thur, mu-kär'-), [key] 1880–1964, U.S. general: supreme commander of allied forces in SW Pacific during World War II and of UN forces in Korea 1950–51. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: macarthur (Thesaurus) macaroon Macartney rose Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language