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 formsex·pound·er, nounpre·ex·pound, verb (used with object)un·ex·pound·ed, adjective

Synonym study

2. See explain.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for expound

Contemporary Examples of expound

Historical Examples of expound

  • 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.

  • "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?



  • 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 detailto expound on one's theories; he expounded his reasoning
Derived Formsexpounder, noun

Word Origin for expound

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

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