What does "trepidation" mean?

Trepidation: Hence, a state of terror or alarm; fear; confusion; fright; as, the men were in great trepidation.

Additional senses

  1. 2.(Anc. Astron.) 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.

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