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addaword.gifdefinition of kill switch

(also activation lock)
a feature on some phones that enables them to be remotely wiped and locked so they cannot be resold
Google and Microsoft will add a "kill-switch" feature to their Android and Windows phone operating systems.
a switch that enables a device to be shut off remotely
Submitted from United Kingdom on 24/06/2014 09:32:00
Definition of kill switch from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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an extra sail sometimes fitted on the front of a boat used for racing