[im.pact.ed] adj (ca. 1616) 1 a: packed or wedged in b: deeply entrenched: not easily changed or removed
2. of a tooth: wedged between the jawbone and another tooth
3: of, relating to, or being an area (as a school district) providing tax-supported services to a population having a large proportion of federal employees and esp. those living or working on tax-exempt federal property "aid to education in ~ areas"