Scram meaning

skrăm
To leave a scene at once; go abruptly.
verb
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A rapid shutting down of a nuclear reactor, especially in an emergency.
noun
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To leave or get out, esp. in a hurry.
verb
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To shut down automatically. Used of a nuclear reactor.
verb
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To manually or automatically shut down (a nuclear reactor) usually by using the control rods.
verb
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Such a shutdown of a nuclear reactor.
noun
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Get out of here; go away (frequently imperative).

If you don't scram, I'll leave instead!

verb
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(intransitive) To abruptly insert the control rods of a nuclear reactor, usually in case of emergency shutdown.
verb
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A rapid shutdown of a nuclear reactor.
noun
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Alternative spelling of SCRAM.
noun
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The emergency shutdown of a nuclear reactor, originally specifically by insertion of one or more safety control rods.
noun
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In a more general sense, an emergency shutdown.
noun
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Origin of scram

  • Perhaps short for scramble

    From American Heritage Dictionary of the English Language, 5th Edition

  • Originally an acronym for Safety Control Rod Axe Man, a term used to refer to the person assigned to the duty of dropping the boron control rods into the "pile" at the University of Chicago in case of emergency. This task was accomplished by cutting the supporting ropes with an axe and allowing the rods to drop into the core by natural gravitational forces.

    From Wiktionary

  • from dialect German schramm, imperative singular form of schrammen (“graze").

    From Wiktionary

  • Back-formation from SCRAM; most etymologies are backronyms.

    From Wiktionary

  • formed by abbreviation of scramble by apocope; or

    From Wiktionary

  • Unclear, conflicting sources are probably backronyms.

    From Wiktionary