IMPACT (2)

impact (2). Impact, v.t. to drive close together or very hard

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Im″pact (?), n. 1. 1. Contact or impression by touch; collision; forcible contact; force communicated.
The quarrel, by that impact driven. Southey. 2. 2. (Mech.) The single instantaneous stroke of a body in motion against another either in motion or at rest.