Rare, and not in N.E.D. The precise meaning is obscure. In the passage quoted, it is equivalent to “extravagant.”
1842. My hon. colleague [Mr. Warren], borne away by this grain-stalled fury, has declared that, if he saw the arm of the assassin raised to strike down John Tyler, he would not raise a finger to prevent it.—Mr. Colquitt of Georgia, in the House of Repr., Aug. 18: Cong. Globe, p. 813, App.
