noun
eldest brother; eldest son
Archaic or literary term for one's eldest brother. In modern Japanese, 長男 (ちょうなん) or 一番上の兄 (いちばんうえのあに) is more common.
古文書には「伯兄」と記されているが、現代ではほとんど使われない。
In old documents it is written as 伯兄, but it is hardly used today.