Impact definition
Meteorites impacting the lunar surface.
An example of impact is the effect that humans are having on the environment.
His spine had an impingement; L4 and L5 made impact, which caused numbness in his leg.
His friend's opinion had an impact on his decision.
Our choice of concrete will have a tremendous impact on the building's mechanical performance.
Still gauging the impact of automation on the lives of factory workers.