Definition from Wiktionary, the free dictionary
greyhound (plural greyhounds)
- A lean breed of dog used in hunting and racing.
- A highball cocktail of vodka and grapefruit juice.
- (dated) A swift steamer, especially an ocean steamer.
- (highball cocktail): salty dog
lean breed of dog used in hunting and racing
- (of fish) To leap rapidly across the surface of the water.