Definition of impactor in English:

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Pronunciation: /imˈpaktər/


chiefly Astronomy
An object (such as a meteorite) that collides with another body.
Example sentences
  • Small impactors deliver meteorites, while large ones infrequently wreak global devastation.
  • The impactor and comet will collide at 10.2km per second, releasing the energy equivalent of 4.4 tonnes of exploding TNT.
  • Although dramatic images of the impact may be sent to Earth in near-real time by the Deep Impact spacecraft and its impactor, the spacecraft themselves have limited remote sensing capability.

For editors and proofreaders

Syllabification: im·pac·tor

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