The term "multiplayer" refers to a game or application that allows multiple users to interact with each other simultaneously, either through a local network or over the internet. In such systems, players can cooperate, compete or communicate with one another in real-time, making for an engaging and social experience. Multiplayer games are typically designed for two or more human players, but can also include AI opponents or allies. The multiplayer functionality is often a key feature of many popular video games, as it allows friends to play together online or strangers to compete against each other in various tournaments and leagues.