In conditioning, the weakening of a conditioned association in the absence of a reinforcer or unconditioned stimulus.

early 15c., "annihilation," from Latin extinctionem/exstinctionem (nominative extinctio/exstinctio) "extinction, annihilation," noun of action from past participle stem of extingue [..]

The process by which a learned response or learned behavior pattern is extinguished or unlearned (or forgotten). Extinction is the psychological term for unlearning. It is the process of forgetting and although there is some controversy over whether or not forgetting naturally occurs over time, it is accepted that extinction can be induced.

The apparent dimming of star or planet when low on the horizon due to absorption by the Earth's atmosphere.

process of complete disappearance of a species from Earth.

When all the members of a clade or taxon die, the group is said to be extinct.

The end of all activity on a project, usually before meeting its stated objectives. The end results of a project terminated by extinction are neither terminated by inclusion or integration. [D00657]

no longer active; extinguished; "the extinction of the volcano" no longer in existence; "the extinction of a species" the reduction of the intensity [..]

The reduction and eventual disappearance of a learned or conditioned response after it is no longer paired with the unconditioned stimulus-response chain.

Reduction in the intensity of electromagnetic radiation received from a celestial body (e.g. a star) as a result of scattering and absorption by intervening material (e.g. dust).

Occurs when the death of last individual of a species perishes; it is the end of the organism and the taxa in which it belongs. © 2010 by Nature Education Knowledge.

1. Biology. Loss of a species or genus completely or in a certain environment. 2. Neurophysiology. A decrease in a nerves excitability. 3. perceptual extinction. 4. Pavlovian conditioning. Change in r [..]

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Extinction is from conditioning and refers to the reduction of some response that the organism currently or previously produced. In classical conditioning this results from the unconditioned stimulus [..]

Short for extinction of simultaneous double stimulation, an inability to recognize the double nature of stimuli presented simultaneously to both sides of the body. People experiencing extinction report the stimulus from only one side.

the total disappearance of a species or population

The elimination of a species (also applicable to levels other than species) due to natural processes or human activity.

the permanent loss of something, generally used with reference to species of plants or animals, when there are no living examples left

The irrevocable elimination of species; can be a normal process of the natural world as species out-compete or kill off others or as environmental conditions change.

the dying out of an entire class, family, genus or species

The global disappearance of an entire species.

(n) no longer active; extinguished(n) no longer in existence(n) the reduction of the intensity of radiation as a consequence of absorption and radiation(n) complete annihilation(n) a conditioning proc [..]

The end of an organism or group of taxa. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to reproduce and recover may have been lost before this point).

The disappearance of a species in an ecosystem. This is due to: the evolution of a new species; environmental change; and the impact of human activity.

the loss of a species completely and forever; happens when the last living member of a species dies

We observe all but the nearest stars through a foreground of dust extinction from our own Milky Way. The CAS tabulates extinction corrections in magnitudes at the position of each object, reddening, f [..]

The disappearance of a species, which is always irreversible.

The end of existence of a species

The cessation of the existence of a species. Extinction of a species occurs when the final individual of that species dies. Though the species may be “extinct in nature”, the species is not extinct un [..]

The loss of light due to scattering and absorption as it passes through the atmosphere.

We observe all but the nearest stars through a foreground of dust extinction from our own Milky Way. The CAS tabulates extinction corrections in magnitudes at the position of each object, reddening, following Schlegel, Finkbeiner & Davis (1998). For the APOGEE survey, which focuses on the most dust-obscured regions of the Galaxy disk and bulge, [..]

The ceasing of existence of a species or taxonomic groups of organisms.

The procedure of presenting the conditioned stimulus without Reinforcement to an organism previously conditioned. It refers also to the diminution of a conditioned response resulting from this procedu [..]

The discovery that species go extinct was made relatively recently in human history: it dates from the early 19th century when Georges Cuvier reconstructured whole skeletons from bone fragments. The m [..]

See extinct

The procedure of presenting the conditioned stimulus without reinforcement to an organism previously conditioned. It refers also to the diminution of a conditioned response resulting from this procedu [..]

The disappearance of a group in part or all of its range.

Ending a behavior by removing reinforcement. For example, a dog barks to get his person’s attention; if the person ignores the dog while he is barking, removing the reward of attention, that behavior [..]

A procedure in which the reinforcement of a previously reinforced behavior is discontinued. Also may be used to describe the "process" by which a previously learned behavior disappears as a [..]

Withholding the reinforcers that maintain a target behavior.

In operant behavior, discontinuing the reinforcement of a response (or the reduction in responding that follows this operation). In negative reinforcement (escape and avoidance), extinction has often [..]

The procedure of extinction involves the breaking of the contingency between an operant and its consequence. For example, a bar press that was followed by food reinforcement no longer produces food. A [..]

Stopping the reinforcement or escape contingency for a previously reinforced response causes the response rate to decrease.

Extinction refers to a procedure in which reinforcement of a previously reinforced operant performance is discontinued. Thus, if a performance has previously occurred with a certain frequency because [..]

is the procedure by which an event that followed a behavior in the past is not reinforced and the probability (or rate) of the behavior decreases.

Is a process in which a response is repeated without reinforcement. When we extinguish a behavior, we withhold the reinforcement that has maintained that behavior in the past so that responses go unre [..]

There is no definition currently available.

The evolutionary termination of a species caused by the failure to reproduce and the death of all remaining members of the species.

The irrevocable elimination of species; can be a normal process of the natural world as species out-compete or kill off others or as environmental conditions change.

A behavioral principle in which the reinforcing consequence for a target behavior is eliminated which results in a decrease in the frequency of the behavior.  If the child is trying to escape a demand [..]

Is the process in which groups of organisms (species) die out.

The ceasing of existence of a species, generally considered to occur upon the death of the last individual of the species.

complete disappearance of a species because of failure to adapt to environmental change.

The state in which all members of a groups of organisms, such as a species, population, family or class, have disappeared from a given habitat, geographic area, or the entire world.

complete disappearance of a species from the earth. This happens when a species cannot adapt and successfully reproduce under new environmental conditions or when it evolves into one or more new speci [..]

See neglect

loss of all individuals and populations of a taxa (global extinction) Extirpation:

the cessation of existence of a species or group of taxa, reducing biodiversity.

The disappearence of a population as a result of the total failure of any individuals within it to reproduce the unique genotypes which it containd.

lang=en 1800s=1818 * '''1818''' — . ''''. *: I did not pretend to enter into the merits of the case, yet I inclined towards the opinions of the hero, whose extinction I wept, without precisely und [..]