Impact?

My dictionary defines the word 'impact' as a collision, or the act of one body striking another .
So why do we have to put up with people asking whether actions or (quite minor) happenings will have an impact on something else?
They really mean have an effect   -  or something will affect something else. There is not going to be an impact!
Sorry......this wrong use of a word like this really annoys me.
It has an impact on my calm state of mind! See?