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1.
Noun (spaceflight terminology): to instantly activate the engine(s) of a terrestrial-situated spacecraft at 100% power, with no consideration of standard sequential gradation of thrust, in an attempt to immediately escape from an emergency situation.
"When Commander Leonov observed the escape tower separating from the Soyuz vehicle, he instantly engaged the crash-launch procedure, and saved his entire crew."
by speedog May 01, 2010