ADJECTIVE (2)

1. no longer in force or use; inactive;
- Example: "a defunct law"
- Example: "a defunct organization"

2. having ceased to exist or live;
- Example: "the will of a defunct aunt"
- Example: "a defunct Indian tribe"

The Collaborative International Dictionary of English v.0.48:

Defunct \De*funct"\ (d[-e]*f[u^][ng]kt"). a. [L. defunctus, p.
   p. of defungi to acquit one's self of, to perform, finish,
   depart, die; de + fungi to perform, discharge: cf. F.
   d['e]funt. See Function.]
   1. Having finished the course of life; dead; deceased.
      "Defunct organs." --Shak.
      [1913 Webster]

            The boar, defunct, lay tripped up, near. --Byron.
      [1913 Webster]

   2. No longer in effect or use; no longer operating; as, a
      defunct business; a defunct law.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Defunct \De*funct"\, n.
   A dead person; one deceased.
   [1913 Webster]

WordNet (r) 3.0 (2006):

defunct
    adj 1: no longer in force or use; inactive; "a defunct law"; "a
           defunct organization"
    2: having ceased to exist or live; "the will of a defunct aunt";
       "a defunct Indian tribe"