Definitions of abandoned application
a formal request that has been given up, especially a formal request to an authority
An application will be considered to be an abandoned application if you fail to answer a request for information within two years.
a request to register a patent or trademark with a patent or trademark office that has been given up; an application that has been removed from a trademark or patent office's docket of pending applications
You can revive an abandoned application by providing evidence that you did not mean to abandon it or that the abandonment could not be avoided under the circumstances.