Definition of mouthguard in English:

mouthguard

Syllabification: mouth·guard
Pronunciation: /ˈmouTHˌgärd
 
/

noun

  • A plastic shield held in the mouth by an athlete to protect the teeth and gums.
    More example sentences
    • A bout begins when the referee shouts ‘shi-jak’, with the competitors wearing body, head, and shin protectors, mouthguards, and a groin guard.
    • Family physicians should advocate the use of appropriate mouthguards and face shields in organized sports.
    • The UI dentistry professor adds that children who participate in organized sports can lessen the likelihood of injuring their teeth by wearing a mouthguard.

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a slit made by cutting with a saw