[ noun im-pakt; verb im-pakt ]
/ noun ˈɪm pækt; verb ɪmˈpækt /


verb (used with object)

verb (used without object)

to have impact or make contact forcefully: The ball impacted against the bat with a loud noise.
to have an impact or effect: Increased demand will impact on sales.

Origin of impact

First recorded in 1775–85; (noun and v.) back formation from impacted

usage note for impact

The verb impact has developed the transitive sense “to have an impact or effect on” ( The structured reading program has done more to impact the elementary schools than any other single factor ) and the intransitive sense “to have an impact or effect” ( The work done at the computer center will impact on the economy of Illinois and the nation ). Although recent, the new uses are entirely standard and most likely to occur in formal speech and writing. See also impactful.


non·im·pact, noun, adjective post·im·pact, adjective

Example sentences from the Web for impact

British Dictionary definitions for impact


noun (ˈɪmpækt)

the act of one body, object, etc, striking another; collision
the force with which one thing hits another or with which two objects collide
the impression made by an idea, cultural movement, social group, etc the impact of the Renaissance on Medieval Europe

verb (ɪmˈpækt)

to drive or press (an object) firmly into (another object, thing, etc) or (of two objects) to be driven or pressed firmly together
to have an impact or strong effect (on)

Derived forms of impact

impaction, noun

Word Origin for impact

C18: from Latin impactus pushed against, fastened on, from impingere to thrust at, from pangere to drive in