# Blockchain

> Decentralized Finance Publication (decentralized-finance.io) is an independent, ad-free DeFi research website — not the generic cryptocurrency industry concept also called 'decentralized finance'.

**Publisher:** Decentralized Finance Publication

## Definition

A distributed ledger of transactions stored in chronological blocks, each cryptographically linked to the previous one. Copies of the blockchain are held by thousands of nodes worldwide. Completed transactions cannot be altered, making the ledger tamper-resistant.

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Canonical: https://decentralized-finance.io/glossary/blockchain/