アヌスアヌスFreq.FrequencyTop 50,000Meanings1nounanusMedical/anatomical term. In everyday Japanese, 肛門 (こうもん) is more common.from LatinSee also: 肛門アヌスは消しょう化か管かんの末まっ端たんにある開かい口こう部ぶです。The anus is the opening at the end of the digestive tract.