1. moves or swings back and forth in a regular rhythm
2. varies or fluctuates between different states, conditions, or opinions

Examples

• The pendulum oscillates steadily back and forth.
• The fan blade oscillates to distribute air throughout the room.
• Her mood oscillates between excitement and anxiety before big events.
• The stock price oscillates wildly during volatile market conditions.
• The radio signal oscillates at a specific frequency.
• His opinion oscillates between supporting and opposing the proposal.
• The temperature oscillates around 70 degrees throughout the day.