ballonets Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. small air-filled bags used in balloons. Example Sentence Ballonets are contained at the front and back of an airship. More Example Sentences Ballonets are important for balloon stability. Synonyms bladders; air pockets; balloons Antonyms ballerina Hear It! Say It! Write It! ballonets Switch to cursive Start Share with your friends: