What a wave might mean

BYE

Think of a casual farewell you might say with a wave, often used when leaving quickly or informally.

"Wave" here isn’t about ocean waves—it’s the casual hand gesture people use to say hello or goodbye. The clue plays on that double meaning, hinting at the word for a farewell. Since "bye" is the short, common way to say goodbye, it fits as the answer. Think of someone waving as they walk away, shouting "Bye!" over their shoulder.