defunct

UK: /dɪˈfʌŋkt/ US: /dɪˈfʌŋkt/ ,(di fungkt′)

WordReference Random House Learner's Dictionary of American English © 2025

de•funct /dɪˈfʌŋkt/   adj. 

1. no longer in effect or use:
   a defunct law.
2. no longer in existence;
   dead.

See -funct-.

WordReference Random House Unabridged Dictionary of American English © 2025

de•funct  (di fungkt′), adj. 

1. no longer in effect or use;
   not operating or functioning:
   a defunct law; a defunct organization.
2. no longer in existence;
   dead;
   extinct:
   a defunct person; a defunct tribe of Indians.

n. 

3. the defunct, the dead person referred to:
   the survivors of the defunct.

• Latin dēfunctus discharged, dead (past participle of dēfungī), equivalent. to dē- de- + functus performed; see function
• 1540–50

de•funct′ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

defunct / dɪˈfʌŋkt/ adjective

1. no longer living; dead or extinct
2. no longer operative or valid

Etymology: 16th Century: from Latin dēfungī to discharge (one's obligations), die; see de-, function

deˈfunctness noun