1. a moving ridge of water on the surface of the sea or a lake
2. a gesture made by moving the hand back and forth
3. a sudden increase in a particular activity or phenomenon

1. to move the hand back and forth as a greeting or signal
2. to move back and forth or up and down

Examples

• The surfer rode the large wave to shore.
• She gave a friendly wave from across the street.
• There was a wave of excitement when the results were announced.
• Radio waves carry signals through the air.
• He waved goodbye as the train departed.
• The flag waved in the strong wind.
• A wave of immigrants arrived in the early 1900s.
• The wheat field waved gently in the breeze.