/ Dictionary / Index B boundless: Meaning and Definition of Find definitions for: bound•less Pronunciation: (bound'lis), [key] — adj. having no bounds; infinite or vast; unlimited: His boundless energy amazed his friends. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: boundless (Thesaurus) bound form bound variable Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language