impaction

Variant of impact

impact definition

im·pact (im pakt′, im′pakt′; for n. im′pakt′)

transitive verb

  1. to force tightly together; pack; wedge
  2. to affect: a usage objected to by some

Etymology: < L impactus, pp. of impingere, to press firmly together: see impinge

intransitive verb

  1. to hit with force
  2. to have an effect: usually with on: a usage objected to by some

noun

  1. a striking together; violent contact; collision
  2. the force of a collision; shock
  3. the power of an event, idea, etc. to produce changes, move the feelings, etc.

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.