What is the meaning of diving?

noun

• An athletic competition that involves diving into water.
  • synonyms: diving event
• A headlong plunge into water.
  • synonyms: dive

verb

• Drop steeply.
  • usage: "the stock market plunged"
  • synonyms: dive, plunge, plunk
• Plunge into water.
  • usage: "I was afraid to dive from the board into the pool"
  • synonyms: dive
• Swim under water.
  • usage: "the children enjoyed diving and looking for shells"
  • synonyms: dive