1a part of the body that has a particular purpose, such as the heart or the brain; part of a plant with a particular purpose:
the internal organs Ç the sense organs (= the eyes, ears, nose, etc.) Ç the sexual / reproductive organs Ç an organ transplant / donor
2(especially humorous) a penis:
the male organ
3(also 'pipe organ) a large musical instrument with keys like a piano. Sounds are produced by air forced through pipes:
She plays the organ in church. Ç organ music
—compare harmonium
4a musical instrument similar to a pipe organ, but without pipes:
an electric organ
—see also barrel organ, mouth organ
5(formal) an official organization that is part of a larger organization and has a special purpose:
the organs of government
6(formal) a newspaper or magazine that gives information about a particular group or organization; a means of communicating the views of a particular group:
The People’s Daily is the official organ of the Chinese Communist Party.