ETH can refer to several things depending on the context:

1. Ethereum: ETH is the native cryptocurrency of the Ethereum blockchain, a decentralized platform that enables smart contracts and decentralized applications (dApps). Ethereum is widely used for various purposes, including decentralized finance (DeFi), non-fungible tokens (NFTs), and more.

2. Ethics: In some contexts, ETH might refer to ethics or ethical considerations.

3. Other meanings: Depending on the context, ETH could have other meanings, such as "ethnology" or "Ethiopia" (country code).

If you're referring to cryptocurrency or blockchain, ETH likely refers to Ethereum.