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  1. simple past tense and past participle of impact

Derived terms[edit]


impacted (comparative more impacted, superlative most impacted)

  1. Having undergone an impact.
  2. (dentistry) Of a tooth, subject to dental impaction.
    Being the last teeth to erupt in the oral cavity, many wisdom teeth are impacted.
  3. (US, economics) Having lost property revenue due to Federal presence, such that it may receive impact aid.
    • 1983, United States. Bureau of Land Management. Colorado State Office, Green River - Hams Fork coal region: round two
      Table A3-1 compares the capabilities of (1) impacted communities and school districts to finance capital improvements from their own resources []
    • 2000, Congressional Record, V. 146, Pt. 6, May 10, 2000 to May 23, 2000
      Like many of my colleagues, I represent one of the most highly impacted schools in the Nation. This school relies on the impact aid program.