/ Dictionary / Index M muddleheaded: Meaning and Definition of Find definitions for: mud•dle•head•ed Pronunciation: (mud'l-hed"id), [key] — adj. confused in one's thinking; blundering: a muddleheaded assertion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: muddleheaded (Thesaurus) muddlehead muddler Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language