1. to throw or drop something from a ship, aircraft, or spacecraft to make it lighter
Usage: nautical; aviation
2. to get rid of something or someone that is no longer wanted or needed

Examples

• The pilot jettisons fuel to reduce weight before landing.
• The cargo ship jettisons containers during the storm.
• The company jettisons unprofitable divisions.
• She jettisons old friendships that no longer serve her.
• The spacecraft jettisons its booster rockets after launch.
• The airline jettisons its least popular routes.