/ Dictionary / Index T thickhead: Meaning and Definition of Find definitions for: thick•head Pronunciation: (thik'hed"), [key] — n. a stupid person; blockhead. Also calledany of several Old World birds of the genus Pachycephala, chiefly of various islands in the Pacific Ocean, related to the flycatchers, and having a melodious whistling call. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thickhead (Thesaurus) thicket thickheaded Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language