3 days ago · impact, collision, shock, concussion mean a forceful, even violent contact between two or more things. impact may be used to imply contact between two things, at least one of which is impelled … IMPACT definition: 1. the force or action of one object hitting another: 2. a powerful effect that something…. IMPACT definition: the striking of one thing against another; forceful contact; collision. See examples of impact used in a sentence. The impact that something has on a situation, process, or person is a sudden and powerful effect that it has on them. They say they expect the meeting to have a marked impact on the future of the country. collision: The impact of the colliding cars broke the windshield. an impinging: the impact of light on the eye. influence; effect: the impact of Einstein on modern physics. an impacting; forcible impinging: the … Definition of impact in the Definitions.net dictionary. What does impact mean? Information and translations of impact in the most comprehensive dictionary definitions resource on the … impact n 1. the act of one body, object, etc, striking another; collision 2.