fire extinguisher

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

• noun A portable apparatus containing chemicals that can be discharged in a rapid stream to extinguish a small fire.

from The Century Dictionary.

• noun An apparatus designed for immediate and temporary use in putting out a conflagration by means of a small stream of water or of water mingled with carbonic-acid gas.

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

• noun A device that can be used to put out a fire. Usually a cylinder filled with carbon dioxide, dry powder or water, in the latter two cases with some means of pressurising the cylinder to expel the contents.

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

• noun a manually operated device for extinguishing small fires