1. a guard in a prison
Usage: chiefly British
2. a person who guards or watches over something
Usage: formal

Examples

• The warder unlocked the cell door during visiting hours.
• Prison warders must undergo extensive training before starting work.
• The night warder made his rounds every two hours.
• She worked as a warder at the local correctional facility.
• The warder of the ancient castle showed tourists around the grounds.
• Each warder was responsible for monitoring a specific section of the prison.