1. a large black and white whale that is the largest member of the dolphin family

Examples

• The orca breached the surface of the water in a spectacular display.
• Orcas are highly intelligent marine mammals that live in pods.
• We watched a family of orcas swimming near the coast.
• The aquarium’s orca show was the main attraction.
• Orcas can grow up to 32 feet in length.
• The documentary showed orcas hunting together as a team.