a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog
"The greyhound zoomed past the other dogs, its sleek body built perfectly for speed."
A lean breed of dog used in hunting and racing.
"We decided to take our luggage on the greyhound instead of renting a car for the long drive south."
A bus run by Greyhound Lines.
To leap rapidly across the surface of the water.
"The greyhound dog leaped rapidly across the surface of the water to catch the duck before it could dive."