noun
the act of throwing or casting something off, especially from a ship or aircraft
verb
to throw or drop something from a ship or aircraft in order to lighten the load or improve stability
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The captain made the decision to jettison excess cargo in order to lighten the ship.
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We need to jettison some of this stuff to make room for more important things.
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Let's just jettison all this junk and start fresh.
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Sometimes you need to jettison toxic relationships in order to move forward in life.