Bible Dictionaries
Perturbation

Webster's Dictionary

(1):

(n.) The act of perturbing, or the state of being perturbed; esp., agitation of mind.

(2):

(n.) A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other.

Bibliography Information
Webster, Noah. Entry for 'Perturbation'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/perturbation.html. 1828.