definition of
[shudder]

[1] #1 shudder v. [shiver] shake, as from cold; "The children are shivering--turn on the heat!". wn

[2] #2 shudder v. [shiver, throb, thrill] tremble convulsively, as from fear or excitement. wn

[3] #3 shudder n. [frisson, shiver, chill, quiver, thrill, tingle] an almost pleasurable sensation of fright; "a frisson of surprise shot through him". wn

[4] #4 shudder n. [tremor] an involuntary vibration (as if from illness or fear). wn