(1):

(v. i.) To collude, as where an informer colludes with the defendant, and makes a sham prosecution.

(2):

(v. i.) To undertake a thing falsely and deceitfully, with the purpose of defeating or destroying it.

(3):

(v. i.) To shift or turn from one side to the other, from the direct course, or from truth; to speak with equivocation; to shuffle; to quibble; as, he prevaricates in his statement.

(4):

(v. t.) To evade by a quibble; to transgress; to pervert.