1. relating to or involving the work of cleaning and maintaining buildings

Examples

• The school hired a new janitorial service to clean the classrooms.
• She works in the janitorial department of the hospital.
• The janitorial staff arrives early each morning to prepare the building.
• He bought janitorial supplies like mops and cleaning chemicals.
• The company provides janitorial services to office buildings downtown.
• Janitorial duties include emptying trash cans and mopping floors.