[ blok-cheyn ]

  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 database created and populated using this structure: Once the transaction gets verified, it's recorded in the blockchain.

Origin of blockchain

First recorded in 2010–15; block + chain

Words Nearby blockchain Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use blockchain in a sentence