Dive is a noun (dive, dives):
- a low class drinking establishment (We went into a real dive for drinks after the game)
- a jump from a diving board (His final dive was a back flip.)
- the pretense of losing a boxing match (He took a dive in the fifth round.)
- an aeroplane procedure ( The fighter plane made a low dive over the troops.)
- an underwater or Scuba expedition (Our next adventure will be a dive to see the Titanic)
Dive is also a verb (dive, dives, diving, dived, dove):
- Jumping into water (We dive off the cliff into the bay.)
- Submerging on a submarine (Dive to 180 meters now!)