An instrument or medium by which some
important action is performed, or an important end accomplished; as,
legislatures, courts, armies, taxgatherers, etc., are organs
of government.
A natural part or structure
in an animal or a plant, capable of performing some special action
(termed its function), which is essential to the life or well-
being of the whole; as, the heart, lungs, etc., are organs of
animals; the root, stem, foliage, etc., are organs of
plants.
A component part performing an essential
office in the working of any complex machine; as, the cylinder,
valves, crank, etc., are organs of the steam engine.
A medium of communication between one
person or body and another; as, the secretary of state is the
organ of communication between the government and a foreign
power; a newspaper is the organ of its editor, or of a party,
sect, etc.
A wind instrument containing numerous pipes of
various dimensions and kinds, which are filled with wind from a
bellows, and played upon by means of keys similar to those of a
piano, and sometimes by foot keys or pedals; -- formerly used in the
plural, each pipe being considired an organ.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
