tiebreak noun 1verb 1forms 4 noun1 •A tiebreaker, a game or an extension to a game played to resolve a tied score.Should the score in the tiebreak become tied at 6 points all, play must continue until one player has a two point advantage. — 1988 verb1 •To break a tie. formstiebroke · tiebroken · tiebreaking · tiebreaks