Block is defined as a single digital record created within a blockchain. Each block contains a record of the previous block, and when linked together these become the “chain”.
Blockchain tech creates permanent, secure digital recordings. It can record any information, but it started with recording bitcoin transactions.
If you imagine the blockchain as a book of records, then each page in that book is what is known as a “block”. Blocks are attached to each other making what is known as the blockchain.