Pronunciation: (thān),[key] —n. 1. Early Eng. Hist.a member of any of several aristocratic classes of men ranking between earls and ordinary freemen, and granted lands by the king or by lords for military service.
2. Scot. Hist.a person, ranking with an earl's son, holding lands of the king; the chief of a clan, who became one of the king's barons. Also,thegn.