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 response to conditioning stimuli.

EXTINCTION: "Man has hunted the humpback whale to the point of extinction."
Cite this page: N., Pam M.S., "EXTINCTION," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/extinction/ (accessed June 16, 2019).