'Impinging' definitions:

Definition of 'impinging'

noun

The physical coming together of two or more things; "contact with the pier scraped paint from the hull" [syn: contact, impinging, striking]

From: GCIDE

Impinge \Im*pinge"\, v. t. [imp. & p. p. Impinged; p. pr. & vb. n. Impinging.] [L. impingere; pref. im- in + pangere to fix, strike; prob. akin to pacisci to agree, contract. See Pact, and cf. Impact.] To fall or dash against; to touch upon; to strike; to hit; to clash with; -- with on or upon. [1913 Webster]
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]