Multi-chain refers to an application, protocol, or token that operates across multiple blockchains. This can mean an app deployed on several networks or a token issued natively on more than one chain, each with its own smart contract and supply managed by the issuer.

Multi-chain setups expand reach and flexibility but can also fragment liquidity and state if the deployments aren’t connected through interoperability mechanisms such as bridges, cross-chain messaging, or omnichain architectures that coordinate activity and supply across networks.