Grade 7 jet stream Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a long narrow wandering current of highspeed winds blowing from a generally westerly direction several miles above the earth's surface Example Sentence The clouds parted from the jet stream. Synonyms airstream; high-speed wind; strong wind Antonyms rain Hear It! Say It! Write It! jet stream Switch to cursive Start Share with your friends: