- in the Middle Ages, the highest-ranking official of a royal household, court, etc.
- the warden or keeper of a royal fortress or castle
- a peace officer in a town or village, with powers and jurisdiction somewhat more limited than those of a sheriff
- Chiefly Brit. a police officer
Origin of constableMiddle English from Old French conestable from Late Latin comes stabuli, literally , count of the stable, hence chief groom from Classical Latin comes, companion, fellow (see count) + stabulum, stable