BO3
Best of three
Example
Are they playing bo3 or bo5 matches in this tournament?
BO3 definition by Slang.net
This page explains what the acronym "BO3" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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BO3 is an acronym for best of 3, a game style where the winner must win two out of three games in order to win the contest. It is commonly used in video games or in sports matches.
The term is similar to the BO5 acronym, which is the match style where a player must win three out of five games in order to win. The term is often used in online games, such as Defense of the Ancients (DotA), StarCraft 2 (Sc2), and League of Legends (LoL).