Definition
A full node is a blockchain participant that stores a complete copy of the blockchain’s data and independently checks every block and transaction against the network’s rules. It maintains and updates this local copy as new data is added, helping keep the network’s record accurate, consistent, and resistant to tampering or incorrect information.
In Simple Terms
A full node is a powerful blockchain computer that keeps the entire history of the chain and double-checks all new transactions and blocks. By doing this, it helps make sure everyone agrees on the same data and that the rules of the blockchain are being followed.
Context and Usage
The term full node is commonly used when discussing how decentralized a blockchain network is and how its data is stored and checked. It appears in conversations about network security, data integrity, and the difference between devices that hold all blockchain data versus lighter participants that rely on others for some information.