<p><strong>Noun</strong></p><ul><li>a natural or artificial place where water is collected and stored for use, especially water for supplying a community, irrigating land, furnishing power, etc.</li><li>a receptacle or chamber for holding a liquid or fluid.</li><li>a cavity or part that holds some fluid or secretion.</li><li>a place where anything is collected or accumulated in great amount.</li><li>a large or extra supply or stock; reserve: a reservoir of knowledge.</li></ul>