Sergeant (noun)

1. A non-commissioned officer ranking above a corporal and below a warrant officer, especially in the army or air force.
2. A police officer ranking above a constable and below an inspector.

Origin:

Middle english (denoting a servant in charge of an office or household): from old french sergent, from latin serviens 'servant', from servire 'to serve'.

Examples:

1. The sergeant was in charge of a squad of soldiers.
2. The sergeant directed the troops during the battle.
3. The sergeant was responsible for training new recruits.
4. The sergeant was known for his strict but fair leadership style.
5. The sergeant solved the crime with the help of his team.