| 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 | Synonyms: pipe organ |
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| (noun) (music) an electronic simulation of a pipe organ | Synonyms: electric organ, electronic organ, Hammond organ |
| (noun) a free-reeded instrument with a piano keyboard in which air is forced through the reeds by bellows | Synonyms: harmonium, reed organ |
| (noun) a fully differentiated structural and functional unit in an animal that is specialized for some particular function | - |
| (noun) a periodical that is published by a special interest group | - |
| (noun) a government agency or instrument devoted to the performance of some specific function | - |