v. t. [ L. perturbare, perturbatum; per + turbare to disturb, fr. turba a disorder: cf. OF. perturber. See Per-, and Turbid. ]
Ye that . . . perturb so my feast with crying. Chaucer. [ 1913 Webster ]
n. The quality or state of being perturbable. [ 1913 Webster ]
a. Liable to be perturbed or agitated; liable to be disturbed or disquieted. [ 1913 Webster ]
n. Disturbance; perturbation. [ R. ] “Perturbance of the mind.” Sharp. [ 1913 Webster ]
v. t. [ From L. perturbatus, p. p. ] To perturb. [ Obs. ] Dr. H. More. [ 1913 Webster ]
a. Perturbed; agitated. [ R. ] [ 1913 Webster ]
n. [ L. perturbatio: cf. F. perturbation. ]
a. Of or pertaining to perturbation, esp. to the perturbations of the planets. “The perturbational theory.” Sir J. Herschel. [ 1913 Webster ]
a. Tending to cause perturbation; disturbing. Sir J. Herschel. [ 1913 Webster ]
n. A perturber. [ R. ] [ 1913 Webster ]