adj.
Pronunciation: im- ' pak-t ə d
Function: adjective
Date: circa 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 especially those living or working on tax-exempt federal property <aid to education in impacted areas>