Pronunciation: (hī'bôl"), [key]
1. a drink of whiskey mixed with club soda or ginger ale and served with ice in a tall glass.
a. a signal to start a train, given with the hand or with a lamp.
b. a signal for a train to move at full speed.
3. Mil. Slang.a hand salute.
Slang.to move at full speed.
to signal to (the engineer of a train) to proceed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.