EX OFFICIO adjective
Definition of ex officio (adjective)
- by virtue of an office or position
- "the head of the department serves as an ex officio member of the board"
EX OFFICIO adverb
Definition of ex officio (adverb)
- by virtue of position
- "the president sat on the committee ex officio"
- synonyms: by right of office
Source: Princeton University Wordnet