- An involuntary trembling, sometimes an effect of
paralysis, but usually caused by terror or fear; quaking; quivering. - Hence, a state of terror or alarm; fear; confusion;
fright; as, the men were in great trepidation. - A libration of the starry sphere in the Ptolemaic
system; a motion ascribed to the firmament, to account for certain
small changes in the position of the ecliptic and of the stars.