| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024im•pact•ed /ɪmˈpæktɪd/USA pronunciation adj. - Dentistry(of a tooth) so positioned that normal growth out of the gum is impossible:impacted wisdom teeth.
- driven together;
tightly packed. - densely populated;
overcrowded:an impacted school district.
See -pact-. WordReference Random House Unabridged Dictionary of American English © 2024im•pact•ed (im pak′tid),USA pronunciation adj. - tightly or immovably wedged in.
- Dentistrynoting a tooth so confined in its socket as to be incapable of normal eruption.
- driven together;
tightly packed. - densely populated or crowded;
overcrowded:an impacted school district.
- Latin impāctus past participle of impingere to fasten, cause to collide, strike, equivalent. to im- im-1 + pag-, variant stem of pangere to drive in, plant firmly + -tus past participle suffix) + -ed2; see impinge
- obsolete impact adjective, adjectival (1675–85
Collins Concise English Dictionary © HarperCollins Publishers:: impacted /ɪmˈpæktɪd/ adj - (of a tooth) unable to erupt, esp because of being wedged against another tooth below the gum
- (of a fracture) having the jagged broken ends wedged into each other
im•pact /n. ˈɪmpækt; v. ɪmˈpækt/USA pronunciation n. - the striking of one thing against another;
collision: [uncountable]The atomic particles break apart on impact with others.[countable]The bullet struck with a tremendous impact. - influence, as the force carried by a new idea, etc.:[uncountable]the impact of Einstein on modern physics.
v. - [~ + object] to drive or press (something) closely or firmly into something.
- Rocketry to collide with:[~ + object]The rocket was designed to impact the planet Mars.
- to have an impact or effect on;
influence: [~ + object]The decision may impact your whole career.[~ + on + object]Increased demand will impact on sales.
See -pact-. WordReference Random House Unabridged Dictionary of American English © 2024im•pact (n. im′pakt;v. im pakt′),USA pronunciation n. - the striking of one thing against another;
forceful contact;
collision:The impact of the colliding cars broke the windshield. - an impinging:the impact of light on the eye.
- influence;
effect:the impact of Einstein on modern physics. - an impacting;
forcible impinging:the tremendous impact of the shot. - the force exerted by a new idea, concept, technology, or ideology:the impact of the industrial revolution.
v.t. - to drive or press closely or firmly into something;
pack in. - to fill up;
congest;
throng:A vast crowd impacted St. Peter's Square. - Rocketryto collide with;
strike forcefully:a rocket designed to impact the planet Mars. - to have an impact or effect on;
influence;
alter:The decision may impact your whole career. The auto industry will be impacted by the new labor agreements.
v.i. - 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.
- (noun, nominal and verb, verbal) back formation from impacted 1775–85
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. Collins Concise English Dictionary © HarperCollins Publishers:: impact n /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
vb /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)
Etymology: 18th Century: from Latin impactus pushed against, fastened on, from impingere to thrust at, from pangere to drive inimˈpaction n |