I. ˈä-fə-sər, ˈȯ- noun
Etymology: Middle English, from Anglo-French, from Medieval Latin officiarius, from Latin officium
Date: 14th century
1.
a. obsolete : agent
b. : one charged with police duties
2. : one who holds an office of trust, authority, or command
the officer s of the bank
chief executive officer
3.
a. : one who holds a position of authority or command in the armed forces ; specifically : commissioned officer
b. : the master or any of the mates of a merchant or passenger ship
II. transitive verb
Date: 1670
1. : to furnish with officers
2. : to command or direct as an officer