Definitions for underwater
ˈʌn dərˈwɔ tər, -ˈwɒt ərun·der·wa·ter

Princeton's WordNet(2.33 / 3 votes)Rate this definition:

1. submerged, submersed, underwateradjective

   beneath the surface of the water

   "submerged rocks"

2. subaqueous, subaquatic, submerged, submersed, underwateradjective

   growing or remaining under water

   "viewing subaqueous fauna from a glass-bottomed boat"; "submerged leaves"

Wiktionary(2.00 / 1 vote)Rate this definition:

1. underwaternoun

   underlying water or body of water, for example in an aquifer or the deep ocean

2. underwaternoun

   A type of lure which lies beneath the water surface.

3. underwaterverb

   to water or irrigate insufficiently

4. underwateradjective

   beneath the surface of the water, or of or pertaining to the region beneath the water surface

5. underwateradjective

   beneath the water line of a vessel

6. underwateradjective

   having negative equity; owing more on an asset than its market value

   We've been underwater on our mortgage ever since the housing crash.

Freebase(3.00 / 3 votes)Rate this definition:

1. Underwater

   Underwater is a term describing the realm below the surface of water where the water exists in a natural feature such as an ocean, sea, lake, pond, or river. Three quarters of the planet Earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4,000 and 5,500 metres below the surface of the oceans. The solid surface location on the planet closest to the centre of the orb is the Challenger Deep, located in the Mariana Trench at a depth of 10,924 metres. Although a number of human activities are conducted underwater—such as research, scuba diving for work or recreation, or even underwater warfare with submarines, this very extensive environment on planet Earth is hostile to humans in many ways and therefore little explored. But it can be explored by sonar, or more directly via manned or autonomous submersibles. The ocean floors have been surveyed via sonar to at least a coarse resolution; particularly-strategic areas have been mapped in detail, in the name of detecting enemy submarines, or aiding friendly ones, though the resulting maps may still be classified. An immediate obstacle to human activity under water is the fact that human lungs cannot naturally function in this environment. Unlike the gills of fish, human lungs are adapted to the exchange of gases at atmospheric pressure, not liquids. Aside from simply having insufficient musculature to rapidly move water in and out of the lungs, a more significant problem for all air-breathing animals, such as mammals and birds, is that water contains so little dissolved oxygen compared with atmospheric air. Air is around 21% O2; water typically is less than 0.001% dissolved oxygen.

Suggested Resources(2.50 / 2 votes)Rate this definition:

1. underwater

   Song lyrics by underwater -- Explore a large variety of song lyrics performed by underwater on the Lyrics.com website.

Matched Categories

1. • Biology

How to pronounce underwater?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say underwater in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of underwater in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of underwater in Pythagorean Numerology is: 3

Examples of underwater in a Sentence

1. Astronaut Mike Fincke:

   Each spacesuit is its own little spaceship, it has its own electrical power and thermal control system, oxygen and everything you need to survive for six to eight hours. We have to know our equipment just like anybody who goes on an expedition mountain climbing or underwater. It's what keeps you alive, so we need to know our equipment very well.

2. Oussama Khatib:

   OceanOne is aimed at bringing a new capability for underwater exploration, the intent here is to have a diver, diving virtually, creating a robot that can be the physical representation of the human.

3. Michael McPherson:

   These items were found in an area that, up until recently, had been underwater. Our evidence response team is on scene using all available forensic resources to process the area, it's likely the team will be on scene for several days.

4. Luca Zaia:

   Despite 5 billion euros underwater, St. Marks Square certainly wouldnt be secure.

5. Alexis karpouzos:

   The Multiplicity and the Unity are one and the same thing, a thing that is both many and one at the same time. The waves, and the currents underwater, make up the ocean. The ocean is the underlying basis for every wave. Neither the ocean, nor the waves, can be understood in isolation from each other.

Images & Illustrations of underwater

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