ex positional


a large-scale public exhibition or show, as of art or manufactured products: an exposition of 19th-century paintings; an automobile exposition. exhibit, demonstration, display, presentation.
the act of expounding, setting forth, or explaining: the exposition of a point of view.
writing or speech primarily intended to convey information or to explain; a detailed statement or explanation; explanatory treatise: The students prepared expositions on familiar essay topics. elucidation, commentary; critique, interpretation, exegesis, explication.
the act of presenting to view; display: The singer gave a splendid exposition of vocal talent.
exposure ( def 10 ).
the state of being uncovered, revealed, or otherwise exposed; exposure.
Music. the first section of a fugue or a sonata form, in which the principal themes normally are introduced.
(in a play, novel, etc.) dialogue, description, etc., that gives the audience or reader the background of the characters and the present situation.

1300–50; Middle English exposicioun < Latin expositiōn- (stem of expositiō), equivalent to exposit(us) (see expose) + -iōn- -ion

expositional, adjective
preexposition, noun
reexposition, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
exposition (ˌɛkspəˈzɪʃən)
1.  a systematic, usually written statement about, commentary on, or explanation of a specific subject
2.  the act of expounding or setting forth information or a viewpoint
3.  a large public exhibition, esp of industrial products or arts and crafts
4.  the act of exposing or the state of being exposed
5.  the part of a play, novel, etc, in which the theme and main characters are introduced
6.  music the first statement of the subjects or themes of a movement in sonata form or a fugue
7.  RC Church the exhibiting of the consecrated Eucharistic Host or a relic for public veneration
[C14: from Latin expositiō a setting forth, from expōnere to display; see exponent]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

late 14c., "explanation, narration," from O.Fr. exposition, from L. expositionem (nom. expositio), from expositus, pp. of exponere (see expound). The meaning "public display" is first recorded 1851 in reference to the Crystal Palace Exposition in London. Abbreviation Expo
is first recorded 1963, in reference to planning for the world's fair held in Montreal in 1967.
Online Etymology Dictionary, © 2010 Douglas Harper
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