1. The striking of one body against another
   "The impact of the meteorite left a crater on the moon's surface"
    
2. A forceful consequence; a strong effect
   "the book had an important impact on my thinking";
   - wallop [informal]
    
3. Influencing strongly
   "they resented the impact of American values on European culture";
   - impingement, encroachment
    
4. The violent interaction of individuals or groups entering into combat
   "The impact of the collision was devastating";
   - shock

1. Come into sudden contact with
   "The meteor impacted the lunar surface";
   - hit, strike, impinge on, run into, collide with
    
2. Have an effect upon
   "Will the new rules impact me?";
   - affect, bear upon, bear on
    
3. Press or wedge together; pack together
   "The snow was impacted on the roof"

Derived forms: impacted, impacts, impacting

Type of: alter, change, combat, consequence, contact, effect, event, fight, fighting, force, impinging, influence, issue, modify, outcome, result, sardine [informal], scrap, squash, squeeze, striking, touch, upshot, wedge

Encyclopedia: Impact, TX