English · Science & Technology
blockchain
/ˈblɒk.tʃeɪn/
[/ˈblɒk.tʃeɪn/]
distributed digital ledger
Advancednoun
Definition
A secure digital record of transactions stored across many computers so it is hard to change.
Example
Each transaction is added to the blockchain, creating a permanent record that nobody can secretly alter.
Each transaction is added to the blockchain, creating a permanent record that nobody can secretly alter.
Etymology
Combining 'block' (a unit of data) and 'chain', coined around the 2008 invention of Bitcoin.
How & Where It’s Used
Underlies cryptocurrencies and many secure record-keeping systems.