a presiding officer of an assembly; chairperson.
Church of England. the chairperson of the lower house of a convocation.
Origin: 1400–50; late Middle English: Related forms
one who speaks for another < Latin prōlocūtor
one who speaks out, equivalent to prōlocū-
(variant stem of prōloquī
to speak forth; prō- pro-1
to speak) + -tor -tor