simple past tense and past participle of impact
"The severe storm impacted our coastal town, leaving power outages across three counties."
In plain English: To be impacted means to have something hit you hard enough that it gets stuck and cannot move freely out of its normal place.
"The bad weather impacted our travel plans significantly."
Having undergone an impact.
"The bridge was impacted by the collision, leaving a large dent in its side."
In plain English: Impacted means something is stuck so tightly that it cannot move freely or break through to where it should go.
"The recent storm impacted our daily commute significantly, causing long delays on all major highways."