fire hydrant

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An upright pipe with a nozzle or spout for drawing water from a water main.

from the GNU version of the Collaborative International Dictionary of English.

• noun an upright hydrant that can supply large volumes of water to use in fighting a fire. They are commonly placed at intervals at the street edge of a sidewalk, spaced for convenience in suppressing fires in towns.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun firefighting A device used by firefighters to obtain water from the main supply, consisting of a barrel, connections for hose and a valve assembly.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an upright hydrant for drawing water to use in fighting a fire