1. somebody in charge: an administrator or manager of something such as an office or school system
2. janitor: somebody in charge of the maintenance of a building
3. high-ranking police officer: in the United Kingdom and Canada, a police officer of a rank above inspector, and in the United States a police officer of high rank, especially the head of a police department
adjective
Definition:
in charge: acting in an administrative or supervisory capacity
[Mid-16th century. < ecclesiastical Latin superintendent-, present participle of superintendere "oversee" < Latin super "over, above" + intendere (see intend); translation of Greek episkopos "overseer"]