big-headed Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. an excessive estimate of one's importance; conceit. Example Sentence She did not like his big-headed ways. Spelled with a hyphen. Synonyms arrogant; conceited; bragging Antonyms shy Hear It! Say It! Write It! big-headed Switch to cursive Start Share with your friends: