Dictionary:

jettison

  (jĕt'ĭ-sən, -zən)

1. To cast overboard or off: a ship jettisoning wastes; a pilot jettisoning aircraft fuel.
2. Informal. To discard (something) as unwanted or burdensome: jettisoned the whole marketing plan.

1. The act of discarding or casting overboard.
2. Jetsam.

[From Middle English jetteson, a throwing overboard of goods to lighten ship, from Anglo-Norman getteson, from Vulgar Latin *iectātiō, iectātiōn-, from *iectātus, past participle of *iectāre, to throw. See jet².]

verb

To let go or get rid of as being useless or defective, for example: discard, dispose of, dump, junk, scrap¹, throw away, throw out. Informal chuck, shuck (off). Slang ditch. See keep/release.

noun

The act of getting rid of something useless or used up: disposal, dumping, elimination, riddance. See keep/release.

Definition: eject; throw overboard
Antonyms: load, take in, take on

n. the selective release of stores from an aircraft other than during a normal attack.

See the Introduction, Abbreviations and Pronunciation for further details.

(DOD) The selective release of stores from an aircraft other than normal attack.

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Dansk (Danish)
v. tr. - kaste over bord, kaste ud
n. - udkastning, udkastning af gods

Nederlands (Dutch)
(uit nood) overboord gooien, droppen, wegdoen, het overboord gooien, het droppen, het wegdoen

Français (French)
v. tr. - (Naut) jeter par-dessus bord, jeter à la mer (pour alléger le navire), se délester de, (Aviat) larguer, (fig) abandonner, renoncer à
n. - largage, abandon

Deutsch (German)
n. - Seewurf, Abwurf
v. - über Bord werfen, wegwerfen, abwerfen

Ελληνική (Greek)
n. - (ναυτ.) διασωστική αβαρία
v. - (μτφ.) απορρίπτω, πετώ στη θάλασσα

Italiano (Italian)
scarico in volo, abbandono, buttar via

Português (Portuguese)
n. - ato (m) de alijar carga
v. - alijar, livrar-se de

Русский (Russian)
выбрасывание груза за борт, отделение ступени ракеты, выбрасывать груз за борт, отделываться от чего-л., отвергать

Español (Spanish)
v. tr. - echar (la carga) al mar, desechar, descartar, tirar (equipo, armas, etc. para aligerar una aeronave, tanque, etc.)
n. - echazón

Svenska (Swedish)
n. - gods som kastats över bord
v. - kasta över bord, göra sig av med, kasta bort, förkasta, överge

中文（简体） (Chinese (Simplified))
投弃, 投弃货物

中文（繁體） (Chinese (Traditional))
v. tr. - 投棄
n. - 投棄, 投棄貨物

한국어 (Korean)
v. tr. - 투하하다, 내던지다
n. - 투하

日本語 (Japanese)
n. - 投げ荷
v. - 投げ捨てる, 捨てる

العربيه (Arabic)
‏(الاسم) طرح حموله السفينه في البحر (فعل) القى حموله السفينه في البحر‏

עברית (Hebrew)
v. tr. - ‮השליך לים, נטש, השליך ממטוס או מכדור פורח‬
n. - ‮נטישה, השלכה לים‬

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