ex officio
adj.
by virtue of office or official position
ex officio
Adjective
1. by virtue of an office or position; "the head of the department serves as an ex officio member of the board"
(similar) official
Adverb
1. by virtue of position; "the president sat on the committee ex officio"
(synonym) by right of office
Ex officio
From office; by virtue, or as a consequence, of an office; officially.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
Ex Officio
By virtue of his office
A magistrate sitting with a judge at the Crown Court would appear ex officio in a case where no judicial function is to be exercised by the magistrate eg case committed to Crown Court for sentence only
Ex Officio
Lat. Term used to designate powers exercised by public officials by virtue or because of the office they hold.