1. relating to or characterized by rotation; turning or spinning around an axis
2. involving a system where people take turns in a position or role

Examples

• The rotatory motion of the Earth causes day and night.
• The engine’s rotatory movement powers the entire machine.
• The club has a rotatory presidency that changes every year.
• Rotatory farming helps preserve soil nutrients.
• The rotatory dial on the old radio crackled as she turned it.
• The committee operates on a rotatory basis with members taking turns as chair.