instrument's Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition possessive noun. an article intended for use in work; something used to achieve an end; a device used to produce musical tones or sounds Example Sentence The button on the instrument's side is broken. Synonyms tool; implement; device Antonyms hand Hear It! Say It! Write It! instrument's Switch to cursive Start Share with your friends: