the striking of one thing against another; forceful contact; 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 tremendous impact of the shot.

the force exerted by a new idea, concept, technology, or ideology

the impact of the industrial revolution.

to drive or press closely or firmly into something; pack in.

to fill up; congest; throng

A vast crowd impacted St. Peter's Square.

to collide with; strike forcefully

a rocket designed to impact the planet Mars.

to have an impact or effect on; influence; alter

The decision may impact your whole career. The auto industry will be impacted by the new labor agreements.

to have impact or make contact forcefully

The ball impacted against the bat with a loud noise.

to have an impact or effect

Increased demand will impact on sales.

noun

appulse , bang , blow , bounce , brunt , buffet , bump , clash , concussion , contact , crash , crunch , crush , encounter , hit , impingement , jar , jolt , jounce , kick , knock , meeting , percussion , pound , punch , quake , quiver , ram , rap , rock , shake , shock , slap , smash , smashup , strike , stroke , thump , tremble , tremor , wallop , burden , consequences , full force , impression , imprint , influence , mark , meaning , power , repercussion , significance , thrust , weight , force , punch*

verb

bang into , clash , collide , crack up , crash , crush , jolt , kick , register , smash , smash up , strike , wrack up , bang , blow , brunt , collision , concussion , contact , effect , force , implication , impression , pound , rock , shack , significance