1. threw or dropped something from a ship, aircraft, or spacecraft to make it lighter
Usage: past tense of jettison; nautical/aviation
2. abandoned or got rid of something that was no longer wanted or useful
Usage: past tense of jettison; figurative use

Examples

• The crew jettisoned excess fuel to reduce weight before landing.
• The spacecraft jettisoned its heat shield after reentry.
• The airline jettisoned several unprofitable routes.
• She jettisoned her original plan and tried a new approach.
• The company jettisoned outdated policies to modernize operations.
• Cargo was jettisoned from the sinking ship.
• The political party jettisoned its controversial platform.