| tank used for collecting and storing a liquid (as water or oil) | the largest reservoir in the United States; located in southeastern Nevada and northwestern Arizona and formed by the Hoover Dam on the Colorado River; the center of a recreational area |
| lake used to store water for community use; a lake (natural or artificial) used to store water and used as a source of water | |
| anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies | |
| a large or extra supply of something | |