Breadcrumb Home > Dictionary > Index M Mound Builders: Meaning and Definition of Find definitions for: Mound' Build"ers Pronunciation: [key] the various American Indian tribes who, in prehistoric and early historic times, erected the burial mounds and other earthworks of the Mississippi drainage basin and southeastern U.S. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mound builder moundsman ✖ Related Content Daily Word Quiz: evanescent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language