Webster's Revised Unabridged Dictionary · 1913

Defunct

Defunct (de*funkt") , adjective

[Latin defunctus, past participle of defungi to acquit one's self of, to perform, finish, depart, die; de + fungi to perform, discharge: compare French défunt. See Function.]

1.
Having finished the course of life; dead; deceased.
Defunct organs. — Shakespeare
The boar, defunct, lay tripped up, near. — Byron
2.
No longer in effect or use; no longer operating; as, a defunct business; a defunct law.

Defunct , noun

A dead person; one deceased.