n. binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
n. once thought to be one of four elements composing the universe (Empedocles)
n. a liquid necessary for the life of most animals and plants
v. supply with water, as with channels or ditches or streams