A1 [U] a clear liquid, without colour or taste, that falls from the sky as rain and is necessary for animal and plant life: a bottle/drink/glass of water bottled/mineral/tap water hot/cold water Can I have a drop of water in my whisky, please? Is there enough hot water for a bath? The human body is about 50 percent water.A2 [U] an area of water, such as the sea, a lake, or a swimming pool: The water's warm - are you coming in? I don't like getting my head under (= in) water. Dad, I swam a whole length of the pool under water (= with the whole head and body below the surface of the water)!› [U] the level of an area of water: The river is difficult to cross during periods of high water.waters [plural] › the area of sea near to and belonging to a particular country: St Lucia depends on its clean coastal waters for its income. › the water contained in a particular lake, river, or part of the sea: In the shallow waters of the Gulf of Mexico, oil rigs attract fish. › UK (US water) the liquid that surrounds a baby inside a pregnant woman's womb: At 3 a.m. her waters broke, and the baby was born soon after.the waters [plural] › water from a spring, especially when used in the past for drinking or swimming in, in order to improve the health: People used to come to this city to take (= drink or swim in) the waters.