American Heritage Dictionary
(4)
Century Dictionary
(2)
GNU Webster's 1913
(2)
WordNet
(2)
Elsewhere on the web
I wonder if Barack Obama has a backup plan - a "jettison" option, if you will - on any references he may make to "global warming" during his inaugural speech - just in case wind chills are hovering around zero on January 20th.— Latest Articles
Perhaps that victory is what emboldened you to now completely jettison the principles that helped you with the inner harbor.— Buffalo Pundit
The seeds of the Ibanez-as-LF disaster were planted on the day that the team decided to jettison Cameron and make a conscious decision to sacrifice defense while chasing minor offensive improvements.— Baseball Analysts
As it spends its rocket tubes, the space ship will jettison them.— Modern Mechanix

American Heritage Dictionary (1)
Century Dictionary (2)
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