1. an assistant or helper, especially one who works closely with another person
Usage: formal
2. a bishop appointed to assist another bishop, often with the right of succession
Usage: ecclesiastical

Examples

• The professor relied on his coadjutor to help manage the research project.
• She served as a faithful coadjutor to the department head for many years.
• The bishop appointed a coadjutor to assist with the growing diocese.
• His coadjutor proved invaluable during the busy conference season.
• The elderly archbishop welcomed his young coadjutor’s fresh perspective.
• Without her trusted coadjutor, the director felt overwhelmed by the workload.