From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( n.) A small intercellular space, often containing resin, essential oil, or some other secreted matter.

(2): ( n.) A place where anything is kept in store; especially, a place where water is collected and kept for use when wanted, as to supply a fountain, a canal, or a city by means of aqueducts, or to drive a mill wheel, or the like.

Holman Bible Dictionary [2]

 2 Chronicles 26:10 Ecclesiastes 2:6 2 Kings 20:20 Isaiah 22:8-11

International Standard Bible Encyclopedia [3]

rez´ẽr - vwôr , - vwar ( מקוה , miḳwāh  ; the King James Version ditch (  Isaiah 22:11 )). See Ditch; Cistern; Pool .