tightlipped Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. not saying much or being secretive. Example Sentence She remained tightlipped about her secret. More Example Sentences The tightlipped boy did not share anything. Synonyms reserved; reticent; quiet Antonyms talkative; chatty; open Hear It! Say It! Write It! tightlipped Switch to cursive Start Share with your friends: