Im*pact" (?), v. t. [imp. & p.
p. Impacted; p. pr. & vb. n.
Impacting.] [L. impactus, p. p. of impingere to
push, strike against. See Impinge.] To drive close; to
press firmly together: to wedge into a place.
Woodward.
Im"pact (?), n. 1.
Contact or impression by touch; collision; forcible contact;
force communicated.
The quarrel, by that impact
driven.
Southey.
2. (Mech.) The single instantaneous
stroke of a body in motion against another either in motion or at
rest.