blockchain

noun

block·​chain ˈbläk-ˌchān 

: a digital database containing information (such as records of financial transactions) that can be simultaneously used and shared within a large decentralized, publicly accessible network

also : the technology used to create such a database

The technology at the heart of bitcoin and other virtual currencies, blockchain is an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.

—Marco Iansiti and Karim R. Lakhani

Examples of blockchain in a Sentence

Recent Examples on the Web

Their system uses quantum-resistant cryptography or Post-Quantum Cryptography (PQC), incorporating that into existing EVM blockchains, to protect data, while a decentralized consensus mechanism validates the security of every device in the network. —Wyles Daniel, USA Today, 3 Nov. 2025

Aman holds expertise in politics, travel, and tech news, especially in AI, advanced algorithms, and blockchain, with a strong curiosity about all things that fall under science and tech. —Aman Tripathi, Interesting Engineering, 30 Oct. 2025

That's a systematic corruption architecture built on blockchain. —Suzanne Blake, MSNBC Newsweek, 29 Oct. 2025

Changes in regulators’ perspectives regarding programmable blockchains could profoundly influence ETH’s value proposition. —Trefis Team, Forbes.com, 29 Oct. 2025

Word History

First Known Use

2011, in the meaning defined above

Rhymes for blockchain

• abstain
• airplane
• alkane
• arcane
• arraign
• attain
• backplane
• betaine
• biplane
• butane
• campaign
• cetane