¦ noun
1. a part of an organism which is typically self-contained and has a specific vital function.
euphemistic a man's penis.
2. a large musical instrument having rows of pipes supplied with air from bellows and arranged in ranks, each controlled by a stop, and played using a keyboard or by an automatic mechanism.
a smaller instrument without pipes, producing similar sounds electronically.
3. a department or organization that performs a specified function.
4. a newspaper or periodical which puts forward the views of a political party or movement.
Derivatives
organist noun
Origin
OE, via L. from Gk organon 'tool, sense organ', reinforced in ME by OFr. organe.