Im-pĭnge', v. i.

v. i. [imp. & p. p. IMPINGED; p. pr. & vb. n. IMPINGING.] [Lat. impingere, from prefix im, for in, and pangere, to fix, strike; It. impingere, impignere.] To fall against; to dash against; to clash upon; to touch upon; to strike; to hit.

The cause of reflection is not the impinging of light on the solid or impervious parts of bodies. Newton.