Startle/ˈstɑːrtl/ Definition 1 of 2Pro Tip 1/3Intensity Matters Used when the surprise or fear effect is strong and abrupt, not mild or expected. The fireworks startled the crowd. Pro Tip 2/3Unexpected Events Often used for situations where something happens suddenly and without warning. A cat leaping out of the bush startled the walker. Pro Tip 3/3Emotional Impact Can imply a range of emotions from mild surprise to intense shock. He was startled to find his car missing.