wave someone off        
phrasal verb with wave verb [ I or T ] uk/weɪv/ us/weɪv/
 与(某人)挥手道别
to wave to someone as they leave a place in order to say goodbye
  We went outside to wave her off. 我们走到外面与她道别。 
 - More examples
 - They came to the airport to wave me off.
 - He had tears in his eyes as he waved her off.