organ UK /ˈɔːɡən/US /ˈoɹɡən/noun 9verb 1forms 3 noun9 •a part of a living thing, built from many cells, that does one main job for the whole bodyNo matter the extraordinary progress that has been made in heart surgery over the past century, the heart remains a vulnerable organ. — 2018 •(euphemistic) The penis.If the Snake has an unmistakeable resemblance to the male organ in its active state, the foliage of the tree or bush is equally remindful of the female. — 1920 •A musical instrument that has multiple pipes which play when a key is pressed (the pipe organ), or an electronic instrument designed to replicate such. •A body of an organization dedicated to the performing of certain functions. •A government organization; agency; authority. •An official magazine, newsletter, or similar publication of an organization. •Ellipsis of organ pipe cactus. •(historical) An Asian form of mitrailleuse.Lieutenant Roberts was also severely wounded by a missile, or weapon called an Organ, which is composed of about thirty-six gun barrels so joined as to fire at once. — 1790 •(no longer used) A device, apparatus.This Organ is called a Thermometer, or Thermoscope, because the degrees of Heat and Cold are measured and marked by it. — 1656 verb1 •(no longer used) To supply with an organ or organs; to fit with organs.[W]hen he says, he has compassion on’em, they should ask, where then are his Bowels! […] Alass! fond Creature, thou art Elemented and Organ’d for other Apprehensions […] — 1681 formsorganed · organing · organs