Dictionary definition · impact
noun
- the striking of one body against another
- a forceful consequence; a strong effect"the book had an important impact on my thinking"
- influencing strongly"they resented the impingement of American values on European culture"
- the violent interaction of individuals or groups entering into combat"the armies met in the shock of battle"
verb
- press or wedge together; pack together
- have an effect upon"Will the new rules affect me?"
Source: Open English WordNet (CC BY 4.0).