blockchain

American  

[blok-cheyn] / ˈblɒkˌtʃeɪn /

noun

Computers.

1. a structure used for a distributed or shared database consisting of discrete blocks of data, with each new block secured and connected to earlier ones by cryptography: used to create digital ledgers for cryptocurrency systems, among other things.

   Several schools now offer courses in the technology behind blockchain.

   Under the scheme, farmers would add information about their produce to a blockchain database that could quickly pinpoint contamination.

2. a distributed or shared database created and populated using a structure consisting of discrete blocks of data, with each new block secured and connected to earlier ones by cryptography.

   Once the transaction gets verified, it's recorded in the blockchain.

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Etymology

Origin of blockchain

First recorded in 2010–15; block ( def. ) + chain ( def. )

Example Sentences

BTQ Technologies is developing a separate version of the bitcoin blockchain that it claims will be safe against quantum computing, and it plans to launch its own cryptocurrency in the future.

From MarketWatch • Mar. 31, 2026

This is because Polymarket uses blockchain technology that allows users to place bets anonymously.

From Salon • Mar. 25, 2026

Securitize will become NYSE’s first digital transfer agent, which allows it to create shares for stocks and exchange-traded funds as digital tokens on a blockchain, the distributed ledger technology behind bitcoin and other cryptocurrencies.

From The Wall Street Journal • Mar. 24, 2026

Nelson said the Hyperliquid exchange is much faster and cheaper to use than the Ethereum blockchain, creating interest among financial institutions, particularly high-frequency traders.

From MarketWatch • Mar. 20, 2026

Subscriptions and services revenue, which includes custodial fees and staking—locking up assets for a fee to verify blockchain transactions—exceeded transaction revenue for the first quarter ever.

From Barron's • Mar. 20, 2026