extinction

Extinction is when all members of a particular group die. Most often, we use it to discuss animal species. Many fear that the tiger is headed for extinction because of development and hunting.

People are still trying to figure out what caused the extinction of the dinosaurs: many think it was because of an asteroid. When people cut down rain forests, it can lead to the extinction of many species. Although extinction can be natural or unintended, the word can also mean forced, planned killing. Many people refer to the Holocaust as Hitler's attempt to bring about the extinction of the Jews. Languages also face extinction when no one speaks them anymore.

PRIMARY MEANINGS OF: extinction

1
n
no longer in existence
2
n
a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
3
n
the reduction of the intensity of radiation as a consequence of absorption and radiation
FULL DEFINITIONS OF: extinction
1

n no longer in existence

“the extinction of a species”
Synonyms:
defunctness
Type of:
death
the absence of life or state of being dead

n complete annihilation

“they think a meteor cause the extinction of the dinosaurs”
Synonyms:
extermination
Type of:
annihilation, disintegration
total destruction

n the act of extinguishing; causing to stop burning

“the extinction of the lights”
Synonyms:
extinguishing, quenching
Type of:
conclusion, ending, termination
the act of ending something

n no longer active; extinguished

“the extinction of the volcano”
Type of:
inaction, inactiveness, inactivity
the state of being inactive
2

n a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus

Synonyms:
experimental extinction
Type of:
conditioning
a learning process in which an organism's behavior becomes dependent on the occurrence of a stimulus in its environment
3

n the reduction of the intensity of radiation as a consequence of absorption and radiation

Type of:
action, activity, natural action, natural process
a process existing in or produced by nature (rather than by the intent of human beings)
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