What is Burgess?

Legal Definition
A magistrate of a borough; generally, the chief officer of the corporation, who performs, within the borough, the same kind of duties which a mayor does in a city. In England, the word is sometimes applied to all the inhabitants of a borough, who are called burgesses sometimes it signifies the representatives of a borough in parliament.
-- Bouviers Law Dictionary
Legal Definition
In English law. An inhabitant or freeman of a borough or town; a person duly and legally admitted a member of a municipal corporation. Spelman; 3 Steph. Comm. 188, 189. A magistrate of a borough. Blount. An elector or voter; a person legally qualified to vote at elections. The word in this sense is particularly defined by the statute 5 & 6 Wm. IV. c. 76, ยงยง 9, 13. 3 Steph. Comm. 192. A representative of a borough or town, in parliament. Co. Litt. 109a; 1 Bl. Comm. 174 In American law. The chief executive officer of a borough, bearing the same relation to its government and affairs that the mayor does to those of a city. So used in Pennsylvania.
-- Black's Law Dictionary
Legal Definition
An inhabitant of a town; a borough magistrate; a town representative in parliament.
-- Ballentine's Law Dictionary