Definitions for organˈɔr gən

Random House Webster's College Dictionary

or•ganˈɔr gən(n.)

a musical instrument having one or more sets of pipes actuated by keyboard and sounded by compressed air. a similar musical instrument having the tones produced electronically:
an electronic organ.
Category: Music and Dance
Ref: Also called pipe organ.; reed organ.; barrel organ.; hand organ.
a grouping of tissues into a distinct structure, as a heart or kidney in animals or a leaf or stamen in plants, that performs a specialized task.
Category: Anatomy, Biology
a newspaper, magazine, or other means of communicating information, thoughts, or opinions, esp. in behalf of some organization or political group.
an instrument or means, as of action.
Category: Anatomy
Ref: penis.

Origin of organ:

bef. 1000; ME: musical instrument, pipe organ, organ of the body, tool 蠐 Gk órganon implement, tool, bodily organ, musical instrument, akin to érgonwork

Princeton's WordNet

organ(noun)
a fully differentiated structural and functional unit in an animal that is specialized for some particular function
organ(noun)
a government agency or instrument devoted to the performance of some specific function
"The Census Bureau is an organ of the Commerce Department"
electric organ, electronic organ, Hammond organ, organ(noun)
(music) an electronic simulation of a pipe organ
organ(noun)
a periodical that is published by a special interest group
"the organ of the communist party"
organ, pipe organ(noun)
wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard
harmonium, organ, reed organ(noun)
a free-reed instrument in which air is forced through the reeds by bellows

Kernerman English Learner's Dictionary

organ(noun)ˈɔr gən
one of the important functioning parts inside your body
the heart, lungs, and other organs
organˈɔr gən
a large musical instrument with a keyboard and pipes of different lengths
He plays the organ at our church.

Wiktionary

organ(Noun)
A largest part of an organism, composed of tissues that perform similar functions.
organ(Noun)
A body of an organization dedicated to the performing of certain functions.
organ(Noun)
A musical instrument that has multiple pipes which play when a key is pressed, or an electronic instrument designed to replicate such.
organ(Noun)
An official magazine, newsletter, or similar publication of an organization.
organ(Noun)
A species of cactus (Stenocereus thurberi)
organ(Noun)
The penis.