D defs.my
Entry 3 senses Webster, 1913

Prefect

/prēf'-ĕktˌ/ · Pre·fect · IPA /ˈpɹiːfɛkt/
01 n. A Roman officer who controlled or superintended a particular command, charge, department, etc.; as, the prefect of the aqueducts; the prefe…
  1. 1.
    A Roman officer who controlled or superintended a particular command, charge, department, etc.; as, the prefect of the aqueducts; the prefect of a camp, of a fleet, of the city guard, of provisions; the pretorian prefect, who was commander of the troops guarding the emperor's person.
  2. 2.
    A superintendent of a department who has control of its police establishment, together with extensive powers of municipal regulation.[France]
  3. 3.
    In the Greek and Roman Catholic churches, a title of certain dignitaries below the rank of bishop.
Phrases & compounds
Apostolic prefect — the head of a mission, not of episcopal rank.