extensionality

[ik-sten-shuhn]

ex·ten·sion

[ik-sten-shuhn]
noun
1.
an act or instance of extending.
2.
the state of being extended.
3.
that by which something is extended; an addition: a four-room extension to a house.
4.
an additional period of time given one to meet an obligation: My term paper wasn't finished so I asked for an extension.
5.
something that can be extended; an extended object: a table with drop-leaf extensions.
EXPAND
6.
range of extending; degree of extensiveness; extent: the extension of our knowledge.
7.
an additional telephone that operates on the principal line.
8.
Commerce. a written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
9.
Physics. that property of a body by which it occupies space.
10.
Anatomy.
a.
the act of straightening a limb.
b.
the position that a limb assumes when it is straightened.
11.
Surgery. the act of pulling the broken or dislocated part of a limb in a direction from the trunk, in order to bring the ends of the bone into their natural situation.
12.
Also called extent. Logic. the class of things to which a term is applicable, as “the class of such beings as Plato and Alexander” to which the term “man” is applicable. Compare intension (def. 5).
13.
Mathematics. a function having a domain that includes the domain of a given function and that has the same value as the given function at each point in the domain of the given function.
14.
Also called file extension. Computers. one or more characters at the end of a filename, usually following a period, used to indicate the type of file.
15.
Manège. the act of bringing or coming into an extended attitude.
COLLAPSE
adjective
16.
of or pertaining to extension courses.

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Extensionality is always a great word to know.
So is quincunx. Does it mean:
a fool or simpleton; ninny.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

Origin:
1350–1400; Middle English < Latin extēnsiōn- (stem of extēnsiō). See extensive, -ion

ex·ten·sion·al·i·ty, ex·ten·sion·al·ism, noun
ex·ten·sion·al, adjective
ex·ten·sion·al·ly, adverb
ex·ten·sion·less, adjective
non·ex·ten·sion, noun
EXPAND
non·ex·ten·sion·al, adjective
pro·ex·ten·sion, adjective
su·per·ex·ten·sion, noun
COLLAPSE


1. stretching, expansion, enlargement, increase, dilation. 3. lengthening, protraction, continuation. 4. delay. 6. limit.


1. contraction.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
extensionality (ɪkˌstɛnʃəˈnælɪtɪ)
 
n
logic the principle that sets are definable in terms of their elements alone, whatever way they may have been selected. Thus {a, b}={b, a}={first two letters of the alphabet}

Collins English Dictionary - Complete & Unabridged 10th Edition
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FOLDOC
Computing Dictionary

extensionality definition


extensional equality

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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