backpacks Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. bags with shoulder straps for carrying items. Example Sentence We put our books and other school supplies in our backpacks. More Example Sentences Backpacks hold books and supplies for class. Synonyms knapsacks; rucksacks; bags Antonyms hat Hear It! Say It! Write It! backpacks Switch to cursive Start Share with your friends: