Sudden/ˈsʌdn/ Definition 1 of 4Pro Tip 1/3Emotional Impact The word 'sudden' often implies a sense of shock or surprise that may affect emotions. The sudden news of her friend's accident left her feeling numb. Pro Tip 2/3Not Predictable 'Sudden' is used when an event occurs without any signs that it was going to happen. Her sudden departure from the party surprised everyone. Pro Tip 3/3Unexpected Change Use 'sudden' to describe quick changes that no one saw coming. The stock market experienced a sudden drop today.