borough English. Hist. A common-law rule of descent whereby the youngest son (or sometimes the youngest daughter or collateral heir) inherited all his father’s lands. • If the landowner had no issue, his youngest brother inherited the land. This practice applied to socage tenures in some parts of England. It was abolished by statute in 1925. — Also termed postremogeniture; ultimogeniture; burgh English; burgh Engloys. See PRIMOGENITURE.