1. plural of porpoise; small marine mammals related to dolphins and whales

1. third person singular present of porpoise; to move through water in an up-and-down motion like a porpoise

Examples

• The porpoises swam alongside our boat for several minutes.
• We spotted a pod of porpoises playing in the waves.
• Porpoises are smaller than most dolphins but equally intelligent.
• The submarine porpoises through the rough seas.
• When the speedboat hits the waves, it porpoises dangerously.
• The dolphin porpoises out of the water in a graceful arc.
• Marine biologists study how porpoises communicate with each other.