means A self-contained part of the body that performs a specific function, like the heart or liver; also a large keyboard instrument that produces sound by forcing air through pipes; and, by extension, a means of communication such as a newspaper that voices a group's views.

from From Greek 'organon,' meaning a tool or instrument — anything you work with — built from the root 'erg-,' to do or work (the same root behind 'energy' and 'ergonomic'). It traveled through Latin 'organum' and Old French before settling into English. The musical sense and the bodily sense grew from the same idea: each is an instrument for a job, whether making music or keeping you alive. The 'newspaper as organ' meaning is a later figurative bloom — a publication treated as the working mouthpiece of a cause.