Smash down Definition 1 of 2Pro Tip 1/3Physical Force Used to describe a very strong physical action, often causing destruction. Protesters managed to smash down the gate. Pro Tip 2/3Violent Action Implies a violent or aggressive act often associated with anger or desperation. In the movie, the hero smashed down the enemy's defenses. Pro Tip 3/3Dramatic Impact Conveys the severity of an event, natural or human-caused, usually negative. The storm was powerful enough to smash down trees.