a rapid stream of liquid or gas forced out of a small opening

a jet of boiling water spurted over his hand

a jet engine

spurt out in jets

blood jetted from his nostrils

travel by jet aircraft

the newly weds jetted off for a honeymoon in New York

a hard black semi-precious variety of lignite, capable of being carved and highly polished

jet beads

Joint European Torus, a machine for conducting experiments in nuclear fusion, at Culham in Oxfordshire