What does expansion mean?

Definitions for expansion
ɪkˈspæn ʃənex·pan·sion

Here are all the possible meanings and translations of the word expansion.

Princeton's WordNet

  1. expansion, enlargementnoun

    the act of increasing (something) in size or volume or quantity or scope

  2. expansionnoun

    a function expressed as a sum or product of terms

    "the expansion of (a+b)^2 is a^2 + 2ab + b^2"

  3. expansion, enlargement, elaborationnoun

    a discussion that provides additional information

  4. expansion, expanding uponnoun

    adding information or detail


  1. Expansionnoun

    an enlarged or extended version of something, such as a writing or discourse; as, the journal article is an expansion of the lecture she gave.

  2. Expansionnoun

    (Economics & Commmerce) an increase in the production of goods and services over time, and in the volume of business transactions, generally associated with an increase in employment and an increase in the money supply. Opposite of contraction.


  1. expansionnoun

    The act or process of expanding.

    The expansion of metals and plastics in response to heat is well understood.

  2. expansionnoun

    The fractional change in unit length per unit length per unit temperature change.

  3. expansionnoun

    A new addition.

    My new office is in the expansion behind the main building.

  4. expansionnoun

    A product to be used with a previous product.

    "This expansion requires the original game-board."

Samuel Johnson's Dictionary

  1. Expansionnoun

    Etymology: from expand.

    ’Tis demonstrated that the condensation and expansion of any portion of the air is always proportional to the weight and pressure incumbent upon it. Richard Bentley, Sermons.

    The easy expansion of the wing of a bird, and the lightness, strength, and shape of the feathers, are all fitted for her better flight. Nehemiah Grew, Cosmolog. Sac. b. i. c. 5.

    The capacious mind of man takes its flight farther than the stars, and cannot be confined by the limits of the world: it extends its thoughts often even beyond the utmost expansion of matter, and makes excursions into that incomprehensible inane. John Locke.

    Distance or space, in its simple abstract conception, I call expansion, to distinguish it from extension, which expresses this distance only as it is in the solid parts of matter. John Locke.

    It would for ever take an useless flight,
    Lost in expansion, void and infinite. Richard Blackmore, Creation.

Webster Dictionary

  1. Expansionnoun

    the act of expanding or spreading out; the condition of being expanded; dilation; enlargement

  2. Expansionnoun

    that which is expanded; expanse; extend surface; as, the expansion of a sheet or of a lake; the expansion was formed of metal

  3. Expansionnoun

    space through which anything is expanded; also, pure space

  4. Expansionnoun

    enlargement or extension of business transactions; esp., increase of the circulation of bank notes

  5. Expansionnoun

    the developed result of an indicated operation; as, the expansion of (a + b)2 is a2 + 2ab + b2

  6. Expansionnoun

    the operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston

  7. Expansionnoun

    the enlargement of the ship mathematically from a model or drawing to the full or building size, in the process of construction

  8. Etymology: [L. expansio: cf. F. expansion.]


  1. Expansion

    In geometry, expansion is a polytope operation where facets are separated and moved radially apart, and new facets are formed at separated elements. Equivalently this operation can be imagined by keeping facets in the same position but reducing their size. According to Coxeter, this multidimensional term was defined by Alicia Boole Stott for creating new polytopes, specifically starting from regular polytopes to construct new uniform polytopes. The expansion operation is symmetric with respect to a regular polytope and its dual. The resulting figure contains the facets of both the regular and its dual, along with various prismatic facets filling the gaps created between intermediate dimensional elements. It has somewhat different meanings by dimension. In a Wythoff construction, an expansion is generated by reflections from the first and last mirrors. By dimension: ⁕A regular {p} polygon expands into a regular 2n-gon. ⁕The operation is identical to truncation for polygons, t0,1{p} and has Coxeter-Dynkin diagram . ⁕A regular {p,q} polyhedron expands into a polyhedron with vertex figure p.4.q.4. ⁕This operation for polyhedra is also called cantellation, t0,2{p,q}, and has Coxeter-Dynkin diagram .For example, a rhombicuboctahedron can be called an expanded cube, expanded octahedron, as well as a cantellated cube or cantellated octahedron.

The Foolish Dictionary, by Gideon Wurdz


    A combination of Grand Larceny and Piracy, involving the destruction of the Constitution and Declaration of Independence.--Boston. The benevolent assimilation of previously oppressed peoples--Washington, D.C. A doubtful commercial experiment.--Wall Street. The white man's burden.--Kipling.

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'expansion' in Spoken Corpus Frequency: #2817

  2. Written Corpus Frequency

    Rank popularity for the word 'expansion' in Written Corpus Frequency: #4055

  3. Nouns Frequency

    Rank popularity for the word 'expansion' in Nouns Frequency: #1199

How to pronounce expansion?

How to say expansion in sign language?


  1. Chaldean Numerology

    The numerical value of expansion in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of expansion in Pythagorean Numerology is: 9

Examples of expansion in a Sentence

  1. Louisiana Gov. Bobby JIndal:

    Justice Roberts twice rewrote the law to save Obamacare, the biggest expansion of government, creating a new entitlement when we can't afford the government we've got today.

  2. Lawrence Lu:

    It will depend on how much capital is eventually engaged in helping Chinese firms go abroad, but generally speaking, the overseas expansion strategy will have a positive impact on Chinese steelmakers in seeking new growth.

  3. Soren Schroder:

    We can argue that it is the uncertainity of the last 7-8 years that will make it very difficult to get that expansion, the industry is very fragile...it needs a period of stability to meet that expansion.

  4. Dinesh McCoy:

    I'm hoping that the Biden administration and other legislative supporters can look at these issues, think about the long-term implications, and act now to really push back on the sort of continued expansion. And really I think an expansion that doesn't often get a lot of criticism from either Democrats or Republicans.

  5. Islam Karimov:

    The creeping expansion of militant extremism and religious radicalism, not only on the territory of the governments of Central Asia but also abroad, is most seriously concerning.

Popularity rank by frequency of use


Translations for expansion

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    not established or confirmed
    • A. occlusive
    • B. omnifarious
    • C. unsealed
    • D. ectomorphic

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