instincts Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. inborn tendency to behave in a way characteristic of a species Example Sentence The dog had maternal instincts for her puppies. Synonyms natural; unlearned; automatic response Antonyms learned; unnatural Hear It! Say It! Write It! instincts Switch to cursive Start Share with your friends: