To shake; quiver; vibrate.Hence, in particular, to tremble with a sudden convulsive movement, as from horror, fright, aversion, cold, etc.; shiver; quake.To have a tremulous or quivering appearance, as if from horror.Synonyms Quake, etc. See shiver.n. A tremulous motion; a quiver; a vibration.n. Specifically, a quick involuntary tremor or quiver of the body, as from fear, disgust, horror, or cold; a convulsive shiver.