DApp (Decentralized Application)
An application whose backend runs on a blockchain — open to anyone with a wallet, no account creation required.
A DApp (decentralized application) is software whose core logic runs as smart contracts on a blockchain rather than on a company’s servers. Users connect a wallet instead of creating an account; the front-end website is just a window onto contracts anyone can also reach directly.
The canonical examples are DEXs, lending markets and NFT platforms. The strengths — permissionless access, composability, resistance to takedowns — come paired with sharp edges: bugs are exploitable by anyone, and a malicious or compromised front-end can present dangerous transactions to sign. The contract, not the website, is the app.