This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A malocclusion of the teeth in which the front upper incisor and canine teeth project over the lower.

n. A malocclusion, in which the upper teeth extend over the lower ones

n. (dentistry) malocclusion in which the upper teeth extend abnormally far over the lower teeth

"This week has been really busy, between going with Olivia's class on their school trip (to Kew Gardens - very chilly, but luckily not too much rain) and taking Sarah to the orthodontist (recommended to have a removeable kind of brace, which luckily, the NHS will pay for because her overbite is severe enough, but of course there's a huge waiting list for NHS services."

malocclusion   

underbite   

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