1. a drink of whiskey mixed with club soda or ginger ale and served with ice in a tall glass.
  2. Railroads.
    1. a signal to start a train, given with the hand or with a lamp.
    2. a signal for a train to move at full speed.
  3. Military Slang. a hand salute.

verb (used without object)

  1. Slang. to move at full speed.

verb (used with object)

  1. to signal to (the engineer of a train) to proceed.


  1. a long iced drink consisting of a spirit base with water, soda water, etc
  2. (originally in railway use) a signal that the way ahead is clear and one may proceed


  1. (intr) to move at great speed
  2. (tr) to drive (a vehicle) at great speed

type of alcoholic drink, 1898, probably from ball “drink of whiskey;” high because it is served in a tall glass.

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