Block
A collection of transactions bundled together and added to the blockchain. Each block contains a reference to the previous block, forming a chain.
Why It Matters
A block is a collection of transactions processed and recorded on the blockchain. Understanding blocks helps investors comprehend how cryptocurrency transactions are secured and verified.
Example
For example, when you send Bitcoin to someone, that transaction is grouped with others into a block. Once verified, this block is added to the blockchain, making the transaction permanent.
Beginner Context
As a newcomer, grasping the concept of blocks is fundamental to understanding how cryptocurrencies function. Blocks are the backbone of the blockchain—the technology that enables secure digital transactions.
Mike Starr
Founder, CryptoWizardTools · M.S. Organizational Management
Last reviewed: August 2026
Related Terms
Mainnet
The primary production blockchain network where actual transactions occur, as opposed to a testnet used for development and testing.
Peer-to-Peer
A decentralized network where participants interact directly with each other without intermediaries.
TPS
Transactions Per Second. A metric used to measure the throughput capacity of a blockchain network.
KYC
Know Your Customer. Identity verification procedures required by exchanges and financial platforms to comply with anti-money laundering regulations.
Whitelist
A list of approved addresses allowed to participate in a token sale, mint an NFT, or use a feature. Whitelists reward early supporters but can also exclude ordinary users. In security, a whitelist also refers to approved, trusted addresses or contracts.