What is the meaning of quo warranto in law?

The words quo warranto means “what is your authority”. It is the writ issued to restrain a person from acting in a public office to which he /she is not entitled. It is issued against the holder of a public office to show to the court under what authority he holds the office. If the court finds that a person is holding office but is not entitled to hold that office, it issues the writ of quo warranto and restricts that person from acting as an office holder

Further Reading:

• Types of Writs – What are Writs?
• Fundamental rights