"impact" in the noun sense
1. impact
the striking of one body against another
2. impact, wallop
a forceful consequence a strong effect
"the book had an important impact on my thinking"
"the book packs a wallop"
3. impingement, encroachment, impact
influencing strongly
"they resented the impingement of American values on European culture"
4. shock, impact
the violent interaction of individuals or groups entering into combat
"the armies met in the shock of battle"
"impact" in the verb sense
1. impact
press or wedge together pack together
2. affect, impact, bear upon, bear on, touch on, touch
have an effect upon
"Will the new rules affect me?"
Source: WordNet® (An amazing lexical database of English)
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