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[ik-spound] /ɪkˈspaʊnd/
verb (used with object)
to set forth or state in detail:
to expound theories.
to explain; interpret.
verb (used without object)
to make a detailed statement (often followed by on).
Origin of expound
1250-1300; Middle English expounen, expounden < Old French espondre < Latin expōnere to put out, set forth, explain, equivalent to ex- ex-1 + pōnere to put
Related forms
expounder, noun
preexpound, verb (used with object)
unexpounded, adjective
Synonym Study
2. See explain. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for expound
Contemporary Examples
Historical Examples
  • Well, my dears, it is useless for me to expound to you that which I cannot myself understand.

    Micah Clarke Arthur Conan Doyle
  • Professor Turner will expound the significance of the frontier in American history.

    The American Mind Bliss Perry
  • "Because—" But it was no moment to expound the personal nature of love.

    Howards End E. M. Forster
  • Will you allow me then to explain how I should have liked to have heard you expound the matter?

    Laws Plato
  • I will expound this meaning of mine through the medium of a parable.

    The Shame of Motley Raphael Sabatini
British Dictionary definitions for expound


when intr, foll by on or about. to explain or set forth (an argument, theory, etc) in detail: to expound on one's theories, he expounded his reasoning
Derived Forms
expounder, noun
Word Origin
C13: from Old French espondre, from Latin expōnere to set forth, from pōnere to put
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for expound

c.1300, from Old French espondre "expound (on), set forth, explain," from Latin exponere "put forth, explain, expose, exhibit," from ex- "forth" (see ex-) + ponere "to put, place" (see position); with intrusive -d (cf. sound (n.1)). The usual Middle English form was expoune. Related: Expounded; expounding.

Online Etymology Dictionary, © 2010 Douglas Harper
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