from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to extension.
  • adj. Having great extent.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having great extent.

from The Century Dictionary and Cyclopedia

  • Pertaining to or having extension or extent; existing in space.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. defining a word by listing the class of entities to which the word correctly applies


Sorry, no etymologies found.


  • What I call extensional self defense mirrors penal code statues in California and other states, known as the “necessity defense.”

    Who's Afraid of Jerry Vlasak?

  • x and y have precisely the same members they are said to have the same extension, and sets are often called extensional entities.


  • If one likes, this could be called extensional self defense, since humans are acting on behalf of animals who are so vulnerable and oppressed they cannot fight back to attack or kill their oppressors.

    Who's Afraid of Jerry Vlasak?

  • As a result, proof theories for R either contain distribution as a primitive rule, or contain a second form of premise combination (so called extensional combination, as opposed to the intensional premise combination we have seen) which satisfies weakening and contraction.

    Substructural Logics

  • Some of the most significant and compelling arguments for and against versions of internalism are therefore extensional, that is to say, based on what reasons agents actually have.

    Reasons for Action: Internal vs. External

  • It is also widely held that in addition to having such properties as reference, truth-conditions and truth ” so-called extensional properties ” expressions of natural languages also have intensional properties, in virtue of expressing properties or propositions ” i.e., in virtue of having meanings or senses, where two expressions may have the same reference, truth-conditions or truth value, yet express different properties or propositions (Frege 1892/1997).

    Mental Representation

  • Photo to the left is an extensional crack taken in the Santa Cruz Mountains, California, on October 17, 1989.

    SETI Institute: Life at the SETI Institute: Friedemann Freund - The Future of Forecasting Earthquakes

  • From an ethical standpoint, such acts would be readily justifiable as a form of extensional self-defense on behalf of voiceless, defenseless sentient beings.

    To dam the torrential rivers of blood and to silence the cacophony of their agonized cries....

  • Given the relentless nature of the systemic torment and slaughter of millions of other sentient beings that take place day after day, violent responses from nonhuman animal lovers are inevitable and are a morally acceptable means of extensional self-defense on behalf of the voiceless, defenseless victims.

    He no longer heard the cries of the animals or saw the flowing blood....

  • And we advance the concept of "extensional self-defense" to say that humans can be legitimate proxy agents for animals who rarely can defend themselves against their tormentors. '

    Averting the China Syndrome


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