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Entry 5 senses · 2 variants Webster, 1913

Impact

/imʹpăkt/ · Im·pact · IPA /ˈɪmpækt/
01 v. t. To drive close; to press firmly together: to wedge into a place.
imp. & p. p. Impacted; p. pr. & vb. n. Impacting
  1. 1.
    To drive close; to press firmly together: to wedge into a place.
  2. 2.
    To affect or influence, especially in a significant or undesirable manner; as, budget cuts impacted the entire research program; the fish populations were adversely impacted by pollution.
  3. 3.
    To collide forcefully with; to strike.
02 n. Contact or impression by touch; collision; forcible contact; force communicated.
  1. 1.
    Contact or impression by touch; collision; forcible contact; force communicated.
    “The quarrel, by that impact driven.” — Southey.
  2. 2.
    The single instantaneous stroke of a body in motion against another either in motion or at rest.(Mech.)