The Collaborative International Dictionary of English v.0.48:
Impingement \Im*pinge"ment\, n. The act of impinging. [1913 Webster]WordNet (r) 3.0 (2006):
impingement n 1: influencing strongly; "they resented the impingement of American values on European culture" [syn: impingement, encroachment, impact] 2: a sharp collision produced by striking or dashing against something [syn: impingement, impaction]