A religion in which rules exist to govern the means by which adherents participate in the religion.

(medicine) A surgical operation in which an organ is moved from a donor to a recipient.

plural of electronic organ

plural of organ pipe

plural of organ console

plural of pipe organ

(baseball) Major League Baseball and its associated minor leagues. This does not include amateur leagues, most professional international leagues, the former Negro Leagues, and independent leagues.

(cybernetics) A process of attraction and repulsion in which the internal organization of a system, normally an open system, increases in complexity without being guided or managed by an outside source.

plural of reed organ

(music) A keyboard musical instrument of which the harmonium and the American organ are the principal types.