Question

What is the definition of impact.

Answer 1

http://www.google.com/webhp?source=search_app#output=search&sclient=psy-ab&q=impact+definition&oq=impact+d&gs_l=hp.1.3.0l4.2610.6027.0.9504.8.6.0.2.2.0.129.645.3j3.6.0...0.0.0..1c.1.17.psy-ab.q043hCJK0FI&pbx=1&bav=on.2,or.r_qf.&bvm=bv.48340889,d.aWc&fp=5c63294c866b4768&biw=711&bih=453

Answer 2

If you're not talking or writing about physical impact, it's better to broaden your vocabulary and use such words as these:

influence (n or v)

affect (v)

effect (n or v)

And there are others. You can find them at these websites:

http://www.thesaurus.com
and
http://www.answers.com