What is the meaning of Defunct?

No longer in use or active, nor expected to be again.

No longer in business or service, nor expected to be again; out of business.

Specifically, of a process: having terminated but not having been reaped (by its parent or an inheritor), and thus still occupying a process slot. See also zombie, zombie process.

(of a language) No longer spoken.

Deceased, dead.

To make defunct.

The dead person (referred to).

deceased

Source: wiktionary.org