What is the meaning of Constable?

One holding the lowest rank in most Commonwealth police forces. (See also chief constable.)

A police officer or an officer with equivalent powers.

An officer of a noble court in the Middle Ages, usually a senior army commander. (See also marshal).

The warden of a castle.

An elected or appointed public officer, usually at municipal level, responsible for maintaining order or serving writs and court orders.

An elected head of a parish (also known as a connétable)

A large butterfly, Dichorragia nesimachus, family Nymphalidae, of Asia.

To act as a constable or policeman.

constable (police title)

constable (high commander or officer of a medieval realm)

constable (warden of a castle)

Source: wiktionary.org