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An officer is a person who has a position of authority in a hierarchical organization. The term derives from Old French oficier "officer, official" (early 14c., Modern French officier), from Medieval Latin officiarius "an officer," from Latin officium "a service, a duty" the late Latin from officiarius, meaning "official."
Ceremonial and other contexts
- Officer, or Great Officer, a grade, class, or rank of within certain chivalric orders and orders of merit, e.g., Legion of Honour, Order of the Garter, Order of the Holy Sepulchre, Order of Leopold (Belgium)
- Great Officer of State
- Merchant marine officer or licensed mariner
- Officer of arms
- Officer in The Salvation Army, and other state decorations
Politics and government