A counterattack is an attack launched in response to someone else's attack. When an army is under assault, a counterattack means fighting back aggressively rather than just defending. Instead of only blocking punches, a boxer might throw a powerful counterattack the moment their opponent finishes swinging.

The word applies beyond physical combat. In soccer, when one team loses possession near their own goal, a swift counterattack sends players racing toward the opponent's goal before they can reorganize their defense. In a debate, if someone criticizes your idea, your counterattack might point out flaws in their own argument.

What makes something a counterattack rather than just an attack? Timing and purpose. A counterattack happens in direct response to an opponent's move, often catching them off guard because they've committed their resources to their own offense. It's a tactical idea: use the momentum of someone's aggression against them. The strategy appears everywhere from chess (where you might sacrifice a piece to launch a devastating counterattack) to politics (where a candidate responds to negative advertising with an aggressive reply).

The word suggests seizing initiative rather than staying passive. Sometimes the best defense truly is a good offense.