1. a digital ledger in which transactions are recorded in blocks that are linked together in a chain and secured using cryptography, typically used in cryptocurrency systems and distributed databases
Usage: technology term; often used in computing and finance contexts

Examples

• Bitcoin operates on a blockchain that records all transactions across a network of computers.
• The company is exploring blockchain technology to improve supply chain transparency.
• Each block in a blockchain contains a cryptographic hash of the previous block, making it extremely difficult to alter past records.
• Blockchain has applications beyond cryptocurrency, including healthcare and legal document verification.
• The immutable nature of blockchain makes it attractive for secure record-keeping.