- to force tightly together; pack; wedge
- to affect: a usage still objected to by some
Origin of impactfrom Classical Latin impactus, past participle of impingere, to press firmly together: see impinge
- to hit with force
- to have an effect: usually with on: a usage still objected to by some
- a striking together; violent contact; collision
- the force of a collision; shock
- the power of an event, idea, etc. to produce changes, move the feelings, etc.