Pounce on Definition 1 of 2Pro Tip 1/3Swift Action It often suggests quick, decisive movement or the initiation of an action without hesitation. She pounced on the chance to lead the project. Pro Tip 2/3Aggressive Undertone Can imply an element of aggression or competitiveness, like a predator hunting. Once the debate started, he pounced on every weak argument. Pro Tip 3/3Physical or Metaphorical Used for both physical attacks of animals and metaphorical 'attacks' like seizing opportunities. Investors pounced on the new tech stocks.