Tremble/ˈtrembl/ Definition 1 of 3Pro Tip 1/3Emotional Indicator Tremble expresses a visible sign of strong emotions, such as fear or excitement. She trembled with excitement before her performance. Pro Tip 2/3Physical Reaction Tremble is involuntary, showing physical reactions that one cannot control. Unable to hide his nerves, he trembled while waiting. Pro Tip 3/3Intensity Variation 'Tremble' can describe a range of severity, from a slight quiver to a more pronounced shake. Upon hearing the news, her body began to tremble lightly.