extinction extinction  /ɪk ˈstɪŋk ʃən/


  1. (n) no longer active; extinguished
  2. (n) no longer in existence
  3. (n) the reduction of the intensity of radiation as a consequence of absorption and radiation
  4. (n) complete annihilation
  5. (n) a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
  6. (n) the act of extinguishing; causing to stop burning


  1. A new study finds that the risk for extinction isn't random it tends to run in evolutionary families, wiping out groups of species at a time.
  2. As demand for sushi threatens bluefin tuna with extinction, governments adopt quotas and activists threaten a boycott.
  3. PTI's Bryan Walsh reports on the amazing wildlife of Madagascar and the struggles its animals face against extinction.


  1. Faith Middleton Chairs Pomperaug Watershed Group's Gala Woodbury Benefit June 15

    Radio is an intimate medium, more so even than print publications that devotees love to touch and hold but proselytizers of digital primacy are hastening toward extinction.
    on June 13, 2013     Source: Litchfield County Times

  2. Photos: Humpback whales flocking to Puget Sound, straits

    Back from near extinction, humpback whales are showing up in Puget Sound and Northwest straits in numbers not seen for decades. “Humpback whales (Megaptera novaeangliae) are surfacing throughout the Sound and Straits, providing whale watchers a spectacular show and environmentalists, researchers and marine mammal scientists an up-close look at an extraordinary conservation success story,” writes ...
    on June 13, 2013     Source: seattlepi.com

  3. New means to communicate population risk assessments among scientists and decision-makers

    Population viability analyses (PVAs) are commonly used to assess extinction risks for species. Despite their many advantages and usefulness, many people find them hard to design, apply and communicate. In a new review, a team of researchers suggests that our capacity to learn from PVAs may be greatly improved using a common standard. The "DAC-PVA" protocol has hence been designed for supporting ...
    on June 11, 2013     Source: Science Daily

Wiki Images for extinction

definition of extinction
meaning of extinction


  1. Paleontologist Meave Leakey, a Genographic adviser, commented: "Who would have thought that as recently as 70,000 years ago, extremes of climate had reduced our population to such small numbers that we were on the very edge of extinction."
    on Apr 24, 2008 By: Meave Leakey Source: USA Today

  2. As Ronald Reagan said, "Freedom is never more than one generation away from extinction."
    on Jul 3, 2010 By: Ronald Reagan Source: Washington Times

  3. "This in my judgment makes the polar bear a threatened species, one likely to become in danger of extinction in the foreseeable future," said Interior Secretary Dirk Kempthorne, punctuating his point with an array of slides, charts and maps...
    on Sep 7, 2007 By: Dirk Kempthorne Source: KSTP.com

Word of the Day
languish languish
/ˈlæŋɡ wɪʃ /