If you dive into some water, you jump in head-first with your arms held straight above your head.

to take part in skydiving

A diving bell is a container shaped like a bell, in which people can breathe air while they work under water.

any of various ducks , such as the pochard , scaup , redhead , and canvasback , that inhabit bays , estuaries , lakes, etc, and can dive and swim beneath the surface of the water

a waterproof suit used by divers , having a heavy detachable helmet and an air supply

chiefly Brit See skin diving

the sport and skill of diving from a high board

the sport or activity of diving and underwater swimming without wearing a diver's costume

the sport of jumping from an airplane and executing free-fall maneuvers before opening the parachute , often at the last possible moment

any of the aquatic predatory beetles of the widely distributed family Dytiscidae, characterized by flattened hindlegs adapted for swimming and diving

A diving board is a board high above a swimming pool from which people can dive into the water.

a reflex of humans, other mammals, reptiles , and birds, triggered by immersion in cold water, that slows the heart rate and diverts blood flow to the brain , heart, and lungs : serves to conserve oxygen until breathing resumes and to delay potential brain damage

the act of diving for the precious gems pearls

Scuba diving is the activity of swimming underwater using special breathing equipment. The equipment consists of cylinders of air which you carry on your back and which are connected to your mouth by rubber tubes .

to jump off the stage at a concert onto the crowd below

the practice of searching through dustbins for discarded but still usable or valuable objects such as food or clothes

a method of diving in which divers live in a complex of decompression chambers for up to 28 days, going to work via a diving bell , and only decompressing at the end of the period. Helium is substituted for nitrogen in the air supply to avoid the narcotic effects of nitrogen

the activity of diving and exploring in the deep parts of the sea

evasiveness

If prices , profits , or exchange rates nosedive , they suddenly fall by a large amount.

a sudden plunge with the nose or front pointing downwards , esp of an aircraft

a sudden steep dive from the surface by a submarine

You can refer to a plane that flies down low over a place in order to drop bombs on it as a dive bomber .

a steep dive by an aircraft with its engines at high power

to jump off the stage at a concert onto the crowd below