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Escape key

or escape key

noun
  1. a key (frequently labeled Esc) found on most computer keyboards and used for any of various functions, as to interrupt or cancel the current process or running program, or to close a pop-up window.
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Also called Escape, Esc key.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018