Base blockchain refers to the foundational layer of a blockchain network. It provides the core functionalities that support transaction validation, data storage, and the consensus mechanism that secures the network.

This layer typically includes features like smart contract execution, token issuance, and governance mechanisms, allowing users to build applications and services on top of it. A well-known example is Ethereum, which allows developers to create decentralized applications (dApps) using its base blockchain. Base blockchains can vary in structure, consensus algorithms, and scalability solutions.

They often serve as a platform for various projects, enabling interoperability and collaboration among different applications. In essence, the base blockchain lays the groundwork for innovation and expansion within its ecosystem, facilitating the development of new technologies and use cases.