大姑 dàgū father's eldest sister Definitions Defs Origin Strokes Stroke Words Sentences Sents dàgū father's eldest sister 大 dà adjective eldest the oldest; first in order of seniority among siblings or relatives姑 gū noun paternal aunt sister of one's father; father's sisterdàgū sister-in-law 大 dà adjective eldest the oldest; first in order of seniority among siblings or relatives姑 gū husband's sister sister of one's husband; sister-in-lawdàgū respectful address for a woman 大 dà [honorific] honorific used to refer to things belonging to the person being addressed姑 gū noun young woman (bound form) young lady; girl