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

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adj. Of or relating to one of four competitions in a tournament, whose winners go on to play in semifinal competitions.

n. A quarterfinal round.

n. A quarterfinal match.

n. One of the four competitions in a knockout tournament whose winners go on to play in the two semifinals.

n. one of the four competitions in an elimination tournament whose winners go on to play in the semifinals

""It's been surprise and excitement that Serena and Venus won the first and third major of the year, but disappointment they weren't able to play more and gotten their ranking up to play these matches later," says CBS analyst Mary Joe Fernandez, referring to the Serena-Henin quarterfinal and Venus-Henin semifinal."

match   

semifinal    overher    12-round    quarter-final    6-47