Legal immunity from suit or liability (in civil litigation) or immunity from prosecution (in criminal prosecutions) is a legal status that protects an individual or entity from liability or criminal prosecution. Immunity may be given to the person or entity by law (usually a state or federal statute) or by the agreement of a party to the litigation (usually in the context of a criminal prosecution)—generally for some greater policy goal. Some common types of immunity include (1) judicial immunity; (2) witness immunity; (3) diplomatic immunity; and (4) governmental or sovereign immunity.

In Oklahoma, legal immunity encompasses various forms where individuals or entities are protected from civil liability or criminal prosecution. Judicial immunity in Oklahoma shields judges from liability for acts performed in their judicial capacity, unless they acted in the clear absence of all jurisdiction. Witness immunity is provided to witnesses for testimony given in court, protecting them from being sued for defamation based on their testimony. Diplomatic immunity is governed by federal law and international treaties, granting foreign diplomats certain protections from lawsuit and prosecution while in the United States. Governmental or sovereign immunity in Oklahoma generally protects state government entities from being sued unless the state has waived immunity, such as through the Oklahoma Governmental Tort Claims Act, which allows for certain types of lawsuits against the state under specified conditions. It's important to note that the specifics of these immunities can be complex and may require consultation with an attorney to understand the full scope and any exceptions.