Immunity may refer to:

• Immunity (medical), a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion, and is related to the functions of the immune system
• Immunity (legal), conferring a status on a person or body that makes that person or body free from otherwise legal obligations such as, for example, liability for damages or punishment for criminal acts
  • Transactional immunity, referring to the inability of the prosecutor to prosecute a witness in exchange for the witness's testimony, an action referred to as "turning state's evidence"
  • Use immunity, under which the government may not use a witness's grand jury testimony to prosecute that person (but if the state acquires evidence for a crime independent of the testimony, the witness can then be prosecuted)