As a Noun: 1. The act of jumping head first into water. English = dive. 2. A person who jumps head first into water as a sport. English = diver. 3. A board high above a swimming pool from which people can dive into the water. English = diving board. 4. Someone who swims underwater wearing special breathing apparatus. English = diver. As a Verb or Adjective: 1. To jump head first into water. English = dive.