Meaning of “impact” - Learner’s Dictionary

impact

noun uk us /ˈɪmpækt/
EFFECT [ no plural ]

B2 the effect that a person, event, or situation has on someone or something:

Latino singers have had a major impact on pop music this year.
PHYSICAL FORCE [ U ]

B2 the force or action of one object hitting another:

The impact of the collision threw her out of the van.
The missile explodes on impact (= when it hits another object).

(Definition of “impact noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)