dive

1. (intransitive) To swim under water.Examples: "He dove in the water to save her."intransitive

2. (intransitive) To jump into water head-first.Examples: "It is not that pearls fetch a high price because men have dived for them."intransitive

3. (intransitive) To jump headfirst toward the ground or into another substance.Examples: "to dive into home plate"intransitive

4. (intransitive) To descend sharply or steeply.Examples: "[the Hammersmith & City at Paddington]: There it dived underground, eventually enabling its train services to run over, and be entangled with, the easterly extensions of the Metropolitan and the District."intransitive

5. (intransitive) To lose altitude quickly by pointing downwards, as with a bird or aircraft.intransitive

6. (intransitive, especially with in) To undertake with enthusiasm.Examples: "She dove right in and started making improvements."especiallyintransitive