Definition of "blinker" [blink•er]

• One that blinks, especially a light that blinks in order to convey a message or warning. (noun)
• See blinder. (noun)
• To put blinders on. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Joe had resorted to another sort of wireless -- the "blinker" -- and, not knowing the call signal for the station he was nearest, had given the prescribed call in such a case, a series of short flashes, or dots."
• "Gordon Brown a "blinker", maybe that's why Ed Balls does that rapid blinking thing, he's trying to curry favour with his master."
• """ Tony thinks Brown's a 'blinker', someone who blinks in a stand-off."