To render neutral; reduce to a state of neutrality between different parties Or opinions. Specifically— To bestow by convention a neutral character upon (states, persons, and things Which would or might otherwise bear a belligerent character); declare non-belligerent, To prohibit hostilities within the limits of, as territory or waters. The article of the treaty which referred to the Black Sea is of especial importance. “The Black Sea is neutralised; its waters and its ports, thrown open to the mercantile marine of every nation, are formally and in perpetuity interdicted to the flag of war of either of the Powers possessing its coasts or of any other Power.” J. M'Carthy, Hist. Own Times, xxviii.
In chem., to destroy or render inert or imperceptible the peculiar properties of, by chemical combination. See neutralization, 1. Ammonia neutralizes the most powerful acids, and forms a very important class of salts. W. A. Miller, Elem. of Chein., § 369.
To render inoperative; invalidate; nullify; counterbalance: as, to neutralize opposition. He acts as Archimedes would have done if he had attempted to move the earth by a lever fixed on the earth. The action and reaction neutralise each other. Macaulay, West. Reviewer's Def. of Mill.As one poison will sometimes neutralise another, when wholesome remedies would not avail, so he was restrained by a bad passion from quaffing his full measure of evil. Dickens, Martin Chuzzlewit, xi.