To dive is to jump head first into the water. You might dare your friend to dive off a boat into a cold lake.

When you dive, you plunge into a pool or other body of water. A bird or airplane also dives when it descends suddenly. The plunge or drop itself is also a dive: "When the plane went into a dive I had to close my eyes." Since 1871, dive has also been used informally for a low-rent or slightly dangerous bar, possibly from the idea that descending to a basement-level establishment involved a "dive" of sorts.

Definitions of dive
  1. noun
    a headlong plunge into water
    synonyms: diving
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    belly flop, belly flopper, belly whop, belly whopper
    a dive in which the abdomen bears the main force of impact with the water
    cliff diving
    diving into the water from a steep overhanging cliff
    a dive in which the diver somersaults before entering the water
    full gainer, gainer
    a dive in which the diver throws the feet forward to complete a full backward somersault and enters the water feet first and facing away from the diving board
    half gainer
    a dive in which the diver throws the feet forward and up to complete a half backward somersault and enters the water facing the diving board
    a dive in which the diver bends to touch the ankles before straightening out
    swallow dive, swan dive
    a dive in which the diver arches the back with arms outstretched before entering the water
    type of:
    swim, swimming
    the act of swimming
  2. noun
    a steep nose-down descent by an aircraft
    synonyms: nose dive, nosedive
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    power dive
    a dive of an airplane that is accelerated both by gravity and by the power of the engine
    type of:
    the act of changing your location in a downward direction
  3. verb
    drop steeply
    synonyms: plunge, plunk
    dump, plunge
    fall abruptly
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    make a power dive
    plunge nose first; drop with the nose or front first, of aircraft
    submerge or plunge suddenly
    descend steeply and rapidly
    chute, jump, parachute
    jump from an airplane and descend with a parachute
    sky dive, skydive
    jump from an airplane and perform various maneuvers before opening one's parachute
    type of:
    come down, descend, fall, go down
    move downward and lower, but not necessarily all the way
  4. verb
    plunge into water
    “I was afraid to dive from the board into the pool”
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    dive so that one hits the water with one's belly
    dive into the water bending the body at the waist at a right angle, like a jackknife
    type of:
    submerge, submerse
    sink below the surface; go under or as if under water
  5. verb
    swim under water
    “the children enjoyed diving and looking for shells”
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    swim underwater with no breathing apparatus other than a snorkel
    dive with a snorkel
    type of:
    travel through water
  6. noun
    a cheap disreputable nightclub or dance hall
    synonyms: honkytonk
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    type of:
    cabaret, club, night club, nightclub, nightspot
    a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink
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