Smack/smæk/ Definition 1 of 6Pro Tip 1/3Physical Impact Used to describe a sharp, usually noisy contact with someone/something. He smacked the ball with the bat, sending it flying. Pro Tip 2/3Negative Action Often implies a negative or disciplinary action, although not always serious. She playfully smacked his arm when he told a joke. Pro Tip 3/3Noisy Connotation The action usually makes a noise that is loud enough to be noticed. The report of the ball being smacked echoed in the gym.