1. Plural of blockchain; distributed digital ledgers that record transactions across multiple computers in a secure, unchangeable chain of data blocks.
Usage: technology; computing; finance

Examples

• Blockchains are used to record cryptocurrency transactions like Bitcoin and Ethereum.
• Many companies are exploring blockchains to improve supply chain transparency.
• Blockchains use cryptography to ensure that data cannot be altered after it is recorded.
• Different blockchains have different rules and purposes depending on their design.
• Banks are investigating blockchains as a way to speed up international payments.
• The security of blockchains depends on the consensus mechanisms that validate new blocks.