Definition of: tremble

(trem′bəl) v.i. ·bled, ·bling
1. To shake involuntarily, as with fear or weakness; be agitated.
2. To have slight, irregular vibratory motion, as from some jarring force; quiver; shake.
3. To feel anxiety or fear.
4. To quaver, as the voice. See synonyms under QUAKE, SHAKE.
—noun
1. The act or state of trembling.
2. plural A debilitating disease of cattle and sheep, possibly caused by eating certain plants, and communicated to man as the milk sickness. [<OF trembler <LL tremulare <tremulus tremulous <tremere tremble, shake]
—trem′bler noun
—trem′bling adjective & noun
—trem′bling·ly adverb
—trem′bly adjective