1. (uncountable) Collectively, items that have been or are about to be ejected from a boat or balloon.
2. (countable) The action of jettisoning items.
1. throw away, of something encumbering
2. throw as from an airplane
Sentences with jettison as a verb:
- The ballooners had to jettison all of their sand bags to make it over the final hill.
- The jettisoning of fuel tanks.