let the cat out of the bag Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition phrase. to reveal a secret. Example Sentence I wanted the gift to be a surprise; but I let the cat out of the bag. Synonyms reveal; tell; permit Antonyms keep secret Hear It! Say It! Write It! let the cat out of the bag Switch to cursive Start Share with your friends: