The tripwire for an unfolding plot to take control of the flight would be the transponder, operated by a switch beside the pilots.
College radio is everywhere, so I could hear both Vampire Weekend and NPR at the flip of a switch.
Without its Korean frenemy, the company will have to switch to a new megasupplier.
She said she had made the switch for a movie role -- though she wouldn't say which one.
On the final day of the campaign, a dreary New England day, the two candidates seemed to switch strategies.
Their master was walking among them with a pipe in his mouth, and a switch in his hand.
Caradoc reached for it, followed it with his hand and presently turned a switch.
The circuit is completed by turning a switch and the plating begins.
Then, when he was satisfied that everything was ready, he reversed the switch.
Dr. Bird stumbled to the switch and closed it, and the ball was flooded with light.
1590s, "slender riding whip," probably from a Flemish or Low German word akin to Hanoverian swutsche, a variant of Low German zwukse "long thin stick, switch," from Germanic base *swih- (cf. Old High German zwec "wooden peg," German Zweck "aim, design," originally "peg as a target," Zwick "wooden peg"), perhaps connected with PIE root *swei- "to swing, bend, to turn."
The meaning "device for changing the direction of something or making or breaking a connection" is first recorded 1797. "The peg sense suits the mech(anical) applications" [Weekley], and these senses may be a direct borrowing from those senses in Continental Germanic languages rather than a continuation of the "pliant wand" sense. The meaning "a change, a reversal, an exchange, a substitution" is first recorded 1920.
1610s, "to strike with a switch," from switch (n.). Related: Switched; switching. The meaning "turn off or on" is first recorded 1853 of trains on tracks, 1881 of electricity, 1932 of radio or (later) television. Sense of "shift, divert" is from 1860. Meaning "to change one thing for another" is recorded from 1919. Switch-hitter is 1930s in baseball slang, 1956 in the sense of "bisexual person."
To inform; snitch (1940s+ Underworld)