behaviours Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. 1 the way a person acts; 2 the typical actions of a person animal thing or group either in general or in certain situations Chiefly British. Example Sentence It's funny how sometimes the behaviours of children are like animals. Synonyms action; attitude; conduct Antonyms not moving Hear It! Say It! Write It! behaviours Switch to cursive Start Share with your friends: