v. t.
The cause of reflection is not the impinging of light on the solid or impervious parts of bodies. Sir I. Newton. [ 1913 Webster ]
But, in the present order of things, not to be employed without impinging on God's justice. Bp. Warburton. [ 1913 Webster ]
n. The act of impinging. [ 1913 Webster ]
a. [ L. impingens, p. pr. ] Striking against or upon. [ 1913 Webster ]