Defunct (adjective)

1. No longer in existence or functioning.
2. No longer in use or operation.

Origin:

From latin defunctus, past participle of defungi, "to finish, complete, die".

Examples:

1. The company went bankrupt and became defunct.
2. The law was deemed unconstitutional and is now defunct.
3. The organization was dissolved and is now defunct.
4. The factory closed its doors and is now defunct.
5. The technology was outdated and is now defunct.