Definitions for expansionɪkˈspæn ʃən

This page provides all possible meanings and translations of the word expansion

Random House Webster's College Dictionary

ex•pan•sionɪkˈspæn ʃən(n.)

  1. the act or process of expanding.

  2. the state or quality of being expanded.

  3. the amount or degree of expanding.

  4. an expanded portion or form of a thing.

  5. Ref: expanse.

  6. the development at length of an expression indicated in a contracted form, as a2+ 2ab+b2 for the expression (a+b)2.

    Category: Math

  7. an increase in economic and industrial activity

    Category: Commerce, Business

    Ref: (opposed to contraction ).

Origin of expansion:

1605–15; < LL


Princeton's WordNet

  1. expansion, enlargement(noun)

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

  2. expansion(noun)

    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, elaboration(noun)

    a discussion that provides additional information

  4. expansion, expanding upon(noun)

    adding information or detail


  1. expansion(Noun)

    The act or process of expanding.

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

  2. expansion(Noun)

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

  3. expansion(Noun)

    A new addition.

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

  4. expansion(Noun)

    A product to be used with a previous product.

    "This expansion requires the original game-board."

Webster Dictionary

  1. Expansion(noun)

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

  2. Expansion(noun)

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

  3. Expansion(noun)

    space through which anything is expanded; also, pure space

  4. Expansion(noun)

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

  5. Expansion(noun)

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

  6. Expansion(noun)

    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. Expansion(noun)

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


  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

Translations for expansion

Kernerman English Multilingual Dictionary


the act or state of expanding

the expansion of metals.

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