/ Dictionary / Index M mainlander: Meaning and Definition of Find definitions for: main•land•er Pronunciation: (mān'lan"dur, -lun-dur), [key] — n. a person who lives on a mainland. (in Hawaii) a person who lives in the continental U.S. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mainland China main line Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language