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antimatter Line breaks: anti|mat¦ter
Pronunciation: /ˈantɪˌmatə/

Definition of antimatter in English:


[mass noun] Physics
Matter consisting of elementary particles which are the antiparticles of those making up normal matter.
Example sentences
  • In the enormous densities of the early moments of the Big Bang the result would have been a catastrophic annihilation of matter and antimatter into radiation.
  • There is both matter (such as electrons) and oppositely charged antimatter (such as positrons).
  • Paul Dirac predicted the existence of antimatter with his relativistic wave equation in 1928.
Definition of antimatter in:
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