orchestras Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. large groups of musicians playing together with various instruments. Example Sentence The orchestras made beautiful music. More Example Sentences Many orchestras perform at concerts each year. Synonyms bands; ensembles; musical groups Antonyms audience Hear It! Say It! Write It! orchestras Switch to cursive Start Share with your friends: