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extinct

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Extinct describes someone or something that has burned out, is no longer in use or no longer exists. (adjective)

An example of extinct is a volcano that is no longer erupting.
An example of extinct is an old marriage custom in an African tribe.
An example of extinct is dinosaurs.

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See extinct in Webster's New World College Dictionary

adjective

1. having died down or burned out; extinguished: an extinct fire
2. no longer active: an extinct volcano
no longer in existence or use; specif., having no living descendant: an extinct species
that no living person holds or can claim: said of offices, titles, etc.
no longer spoken as a native language

See extinct in American Heritage Dictionary 4

(ĭk-stĭngktˈ)

adjective

No longer existing or living: an extinct species.
No longer burning or active: an extinct volcano.
No longer in use: an extinct custom. See Synonyms at dead.
Law Lacking a claimant; void: an extinct title.

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