underwater.

Definition of underwater. in English English dictionary: u; beneath the surface of the water, or of or pertaining to the region beneath the water surface; underlying water or body of water, for example in an aquifer or the deep ocean; A type of lure which lies beneath the water surface; having negative equity; owing more on an asset than its market value
We've been underwater on our mortgage ever since the housing crash.; to water or irrigate insufficiently; beneath the surface of the water; "submerged rocks"; Something that exists or happens underwater exists or happens below the surface of the sea, a river, or a lake. giant submarines able to travel at high speeds underwater Some stretches of beach are completely underwater at high tide Underwater is also an adjective. underwater exploration. a retired underwater photographer; of, relating to, designed for, growing, living or used beneath the surface of the water; Underwater devices are specially made so that they can work in water. underwater camera equipment. a pool of clear water lit by underwater lights. below the surface of an area of water, or able to be used there; beneath the water line of a vessel; growing or remaining under water; "viewing subaqueous fauna from a glass-bottomed boat"; "submerged leaves"; {s} beneath the water