/ Dictionary / Index H headless: Meaning and Definition of Find definitions for: head•less Pronunciation: (hed'lis), [key] — adj. without a head. having the head cut off; beheaded. having no leader or chief; leaderless. foolish; stupid: a headless argument. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: headless (Thesaurus) headland head lettuce 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