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impact

verb

  1. to collide with, hit, strike
  2. to compress [transitive], be very firmly packed [intransitive]
  3. to affect, have an effect on
L36271 on Wikidata ↗

noun

  1. high force or shock applied over a short time period when two or more bodies collide
  2. act or process of colliding with, hitting, striking
  3. having an effect on
L4146 on Wikidata ↗

Wiktionary

Pronunciation: /ˈɪmpækt/ / /ɪmˈpækt/

noun

Etymology: Attested since the 17th century, from Latin impāctus.

  1. The striking of one body against another; collision.
  2. The force or energy of a collision of two objects.

    The hatchet cut the wood on impact.

  3. A forced impinging.

    His spine had an impingement; L4 and L5 made impact, which caused numbness in his leg.

  4. A significant or strong influence or effect.

    His friend's opinion had an impact on his decision.

    Our choice of concrete will have a tremendous impact on the building's mechanical performance.

verb

Etymology: Attested since the 17th century, from Latin impāctus.

  1. To collide or strike, the act of impinging.

    When the hammer impacts the nail, it bends.

    As a microbullet impacts the graphene, the diameter of the cone it creates – determined by later examination of the petals – provides a way to measure how much energy the graphene absorbs before breaking.

  2. To compress; to compact; to press into something or pack together.

    The footprints of birds do not impact the soil in the way those of dinosaurs do.

  3. To significantly or strongly influence or affect; to have an impact on.

    I can make the changes, but it will impact the schedule.

  4. To stamp or impress onto something.

    Ideas impacted on the mind.