All 7 Uses

impact
in
The Other Wes Moore
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But that story had less of an impact on me than another series of articles in the Sun, about an incident that happened just months before, a precisely planned jewelry store robbery gone terribly wrong.†
p. xi.8
The book is broken up into eight chapters, corresponding to eight years that had a decisive impact on our respective lives.†
p. xiv.3
I really haven't thought too deeply about his impact on my life because, really, he didn't have one.†
p. 3.1 *
So tell me, what impact did your father not being there have on your childhood?†
p. 4.6
Tall but not physically imposing, he dreamed of being on television—having a voice that made an impact.†
p. 11.8
As I started to think seriously about how I could become the person I wanted to be, I looked around at some of the people who'd had the biggest impact on my life.†
p. 132.4
But my glib answer didn't do justice to the impact the time in his office had had on me.†
p. 159.6

Definitions:

(1) (impact as in: her impact on foreign policy)
influence or effect
(2) (impact as in: at the moment of impact)
collision (when two objects collide or crash)
(3) (meaning too rare to warrant focus)
Much less commonly, impact can refer to pressure as when describing a tooth impacted against another tooth or an impact ulcer that appears on the skin from something that presses on it.