Headborough \Head"bor*ough\, Headborrow \Head"bor*row\ n. 1. The chief of a frankpledge, tithing, or decennary, consisting of ten families; -- called also {borsholder}, {boroughhead}, {boroughholder}, and sometimes {tithingman}. See {Borsholder}. [Eng.] --Blackstone. 2. (Modern Law) A petty constable. [Eng.]