Crypto glossary
Renounced ownership
Renounced ownership means a token contract's owner role has been handed to no one, so owner-only functions such as changing taxes can no longer be called.
Many token contracts include an owner address that can call privileged functions: setting fees, pausing transfers, blacklisting wallets or minting. Calling renounceOwnership transfers that role to the zero address, an account nobody controls. From then on, any function guarded by the owner check is permanently unusable, which block explorers show as the owner being 0x000…000.
In memecoin markets, renouncing is used as a trust signal: buyers can verify on-chain that the developer can no longer change the rules. Scanners list it next to liquidity locks and tax levels, and launchpads sometimes renounce automatically.
Renouncing only disables what the owner check protected. A contract can have other admin roles, proxy upgrade keys, hidden functions or tokens held by the team, and the developer can still sell their supply or pull unlocked liquidity. On the other hand, renouncing also removes the ability to fix bugs, so it is not automatically a good practice for serious protocols.
Example
A block explorer shows that a token's owner is now the zero address, so the tax functions in its contract can never be called again.