Shudder/ˈʃʌdər/ Definition 1 of 4Pro Tip 1/3Unpleasant Trigger Use 'shudder' when describing a physical reaction to something upsetting or disturbing. I shuddered every time I heard his name. Pro Tip 2/3Involuntary Movement 'Shudder' implies a small, uncontrollable movement, unlike voluntary shivering to get warm. She shuddered as if touched by a chill. Pro Tip 3/3Brief Sensation A 'shudder' typically describes a quick, momentary action, not a prolonged state. A shudder passed through the crowd at the announcement.