海かい士しかいしFreq.FrequencyTop 100,000Meanings1nounseamanA somewhat formal or occupational term for a sailor or mariner. In modern casual speech, 船員 (せんいん) or 船乗り (ふなのり) are more common.彼かれは若わかい頃ころ、海かい士しとして世せ界かい中じゅうを旅たびした。When he was young, he traveled the world as a seaman.