defunct

adj.
Having ceased to exist or live: a defunct political organization.

[Latin dēfūnctus, past participle of dēfungī, to finish : dē-, de- + fungī, to perform.]

defunctive de·func'tive adj.
defunctness de·funct'ness n.

The condition of a company, whether publicly traded or private, that has gone bankrupt and ceased to exist. If the company was publicly traded, it will be delisted from the exchange where it was listed, and its stock will be worth nothing.

This term also applies to currencies that are no longer in circulation.

Investopedia Says:
In exceptional situations, the Securities and Exchange Commission does allow the stock of a defunct company to continue to trade for a period of time, but this is as a result of legal technicalities rather than a particular right or privilege.

History has seen many defunct currencies (e.g. the Greek drachma and the Dutch guilder). Currencies can become defunct for many reasons - for example, due to political upheaval or revolution, or because the currency has become worthless in the foreign exchange market.

Related Links:
Listed securities are 'the cream of the crop'. Find out how a firm can lose that status and why you should be wary. The Dirt On Delisting
It's a part of everyone's life, and we all want it, but do you know how it gains value and how it is created? What Is Money?
We go over the ground rules and available resources needed for this undertaking. Wading Into The Currency Market

adjective

1. No longer alive: asleep, dead, deceased, departed, extinct, gone, late, lifeless. Idioms: at rest, pushing up daisies. See live/die.
2. No longer in use, force, or operation: dead, extinct, lost, vanished. See live/die, new/old.

adj

Definition: extinct, not functioning
Antonyms: alive, existent, existing, functioning, live, operating, operative, valid, working

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Defunct

Dansk (Danish)
adj. - afdød, fordum, uddød

Nederlands (Dutch)
niet meer bestaand, niet meer goed functionerend

Français (French)
adj. - (lit) défunt, décédé, (fig) défunt

Deutsch (German)
adj. - gestorben, erloschen

Ελληνική (Greek)
adj. - εκλιπών, θανών (κν. μακαρίτης), όχι σε ισχύ, σε αχρησία

Italiano (Italian)
scaduto

Português (Portuguese)
adj. - defunto, extinto

Русский (Russian)
покойный

Español (Spanish)
adj. - vencido, caducado

Svenska (Swedish)
adj. - avliden, inte längre gällande

中文（简体）(Chinese (Simplified))
死的, 非现存的, 无效的

中文（繁體）(Chinese (Traditional))
adj. - 死的, 非現存的, 無效的

한국어 (Korean)
adj. - 사라져 버린, 죽은

日本語 (Japanese)
adj. - 死亡した, 消滅した, 現存しない

العربيه (Arabic)
‏(صفه) ميت, لم يعد يستعمل, لم يعد ذو فعاليه‏

עברית (Hebrew)
adj. - ‮לא קיים, מת‬

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