1. A slender, fast dog breed with a long narrow head, used historically for hunting and in modern dog racing.
2. A long-distance bus or coach, especially one operated by Greyhound Lines (trademark).
Usage: informal; chiefly North American

Examples

• The greyhound is one of the fastest dog breeds in the world.
• She took a greyhound bus across the country to visit her family.
• Greyhounds were originally bred for hunting hares and deer.
• The racing greyhound sprinted around the track at incredible speed.
• He boarded a greyhound at the station early in the morning.
• Retired greyhounds make gentle and affectionate pets.