Definition of ex-officio
"ex-officio" is probably misspelled. Trying ex_officio instead Definition of ex_officio
1. ex_officio [ r ] by virtue of position
Examples:
"the president sat on the committee ex officio"
2. ex_officio [ a ] by virtue of an office or position
Examples:
"the head of the department serves as an ex officio member of the board"