Extinction
noun /ɪkˈstɪŋk.ʃən/ — The permanent ending of a species; the dying out of something completely.
Definition
The state or process of a species, family, or other group of animals or plants ceasing to exist. In psychology: the gradual disappearance of a learned response when it is no longer reinforced. Extinction is irreversibility — the thing that cannot be undone.
Beyond the definition
Extinction is the word that means: this will never exist again. Not rare. Not struggling. Gone. Every extinct species is a permanent reduction in the complexity and beauty of the world — a door closed that will never reopen.
Origin & history
Latin: 'extinguere' (to quench, to extinguish). From 'ex' (out) + 'stinguere' (to quench). The same root as 'extinguish'. Life as a flame: burning while it burns, gone when it's out.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The dodo's extinction was a direct consequence of human arrival on Mauritius — gone within a century.
Mass extinction events have occurred five times in Earth's history. We may be in the sixth.
She felt the extinction of a version of herself — the person she had been before that particular year.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Extinction” when the meaning fits your context: The state or process of a species, family, or other group of animals or plants ceasing to exist. In psychology: the gradual disappearance of a learned response when it is no longer reinforced. Extinction is irreversibility — the thing that cannot be undone.
Synonyms
annihilation, obliteration, end, disappearance
Antonyms
survival, flourishing, regeneration
Related words
Extinction vs endangered
Endangered means a species is at high risk of dying out. Extinction means the species is already gone completely.
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Old Chair Reclaimed by Forest
A beautiful, old wooden chair is slowly being reclaimed by the forest floor, with vines wrapping around it and mushrooms growing on it.
The chair's decay represents extinction—an irreversible process. As it returns to the earth, the human-made form disappears, illustrating that once the structure reaches a certain point of deterioration, it cannot be undone, serving as a reminder of the permanent disappearance of things that no longer exist.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Extinction" mean?
Extinction is noun meaning: The permanent ending of a species; the dying out of something completely.. The state or process of a species, family, or other group of animals or plants ceasing to exist. In psychology: the gradual disappearance of a learned response when it is no longer reinforced. Extinction is irreversibility — the thing that cannot be undone.
Where does the word "Extinction" come from?
Latin: 'extinguere' (to quench, to extinguish). From 'ex' (out) + 'stinguere' (to quench). The same root as 'extinguish'. Life as a flame: burning while it burns, gone when it's out.