Bitcoin Glossary – Plain-English Bitcoin Definitions
This page is a reference, not a lesson. You never need to read it from top to bottom.
This glossary provides plain-English explanations of common Bitcoin terms. It is designed for beginners, long-term thinkers, and anyone who wants clear explanations without hype or technical jargon.
These definitions reflect the language used throughout the Bitcoin Clarity course by Bitcoin Foundations.
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Core Bitcoin Concepts
Bitcoin (BTC)
A decentralized digital money system that allows people to send value directly to one another without banks or governments.
Blockchain
A public, permanent ledger that records Bitcoin transactions. Once data is added, it cannot be changed.
Decentralization
No single company, government, or person controls Bitcoin. Power is distributed across a global network.
Scarcity
Bitcoin has a fixed supply of 21 million coins, enforced by code.
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Ownership & Security
Private Key
A secret cryptographic code that proves ownership of Bitcoin. Whoever controls it controls the funds. Not your keys, not your coins.
Public Key
A cryptographic identifier used to generate Bitcoin addresses and verify transactions.
Wallet
Software or hardware that stores private keys — not the Bitcoin itself.
Cold Storage
Keeping private keys offline for maximum security.
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 Buying & Using Bitcoin
Exchange
A platform where you can buy, sell, and trade Bitcoin.
Market Order
An order to buy or sell immediately at the current price.
Limit Order
An order that executes only at a price you choose.
Liquidity
How easily Bitcoin can be bought or sold without significantly affecting price.
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 Money, Inflation & Retirement
Fiat Currency
Government-issued money not backed by a physical asset.
Inflation
The loss of purchasing power caused by expansion of the money supply.
Store of Value
An asset designed to preserve purchasing power over time.
Sound Money
Money that maintains its value over long periods of time.
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Optional: Deeper Bitcoin Concepts
You do not need to understand everything in this section to use Bitcoin responsibly. This content is provided for curiosity and future reference only.
Mining
The process by which new Bitcoin is created and transactions are secured.
Hash Rate
A measure of the computing power securing the Bitcoin network.
Consensus
The method by which the Bitcoin network agrees on valid transactions.
Lightning Network
A secondary layer built on Bitcoin that enables faster, lower-cost transactions.
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Common Questions
What is Bitcoin backed by?
Bitcoin is backed by mathematics, cryptography, network consensus, and the energy used to secure the system — not by a government or physical commodity.
Is Bitcoin anonymous?
Bitcoin is not anonymous. Transactions are public, but identities are not automatically attached.
Is Bitcoin safe?
Bitcoin’s protocol has operated securely for many years. However, how safely an individual uses Bitcoin depends on custody practices and personal responsibility.
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If you’d like a structured, calm introduction to Bitcoin that builds on these concepts, the Bitcoin Clarity course provides a guided framework for understanding risk, custody, and optionality.
