jettison UK /ˈd͡ʒɛtɪsn̩/US /ˈdʒɛt.ə.s(ə)n/noun 2verb 2forms 3 noun2 •The act of throwing goods overboard to lighten a ship or aircraft in distress.The captain ordered the immediate jettison of the heavy cargo to save the sinking ship.The maritime court spent weeks reviewing the legality of the cargo jettison during the storm. •Items that have been or are about to be ejected from a boat or balloon to lighten the vessel.The shoreline was littered with the floating jettison from the wrecked freighter.Deep-sea divers discovered centuries-old jettison resting on the sandy seafloor. verb2 •To eject from a boat, submarine, aircraft, spaceship or hot-air balloon, so as to lighten the load.The ballooners had to jettison all of their sand bags to make it over the final hill.The fuel tanks were jettisoned. •(figurative) To let go or get rid of as being useless or defective.[…] the defense of horrendous behavior as “free speech”; the jettisoning of “free speech” when it served corporate purposes; the way no one seeks permission but all expect forgiveness. — 2018 formsjettisoned · jettisoning · jettisons