The level, at a particular site, below which the subsoil and rock masses of the earth are fully saturated with water.
The level of the water table below ground.
Of a route that follows a riverbank or shoreline.
The waterline of a ship.
An instrument to show the level by means of the surface of water in a trough, or in upright tubes connected by a pipe.
The level of a body of water, especially when measured above a datum line.