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From Middle English expounden, from Old French espondre, from Latin exponere. Doublet of expose.


  • IPA(key): /ɪkˈspaʊnd/, /ɛkˈspaʊnd/
  • (file)
  • Rhymes: -aʊnd


expound (third-person singular simple present expounds, present participle expounding, simple past and past participle expounded)

  1. (transitive) To set out the meaning of; to explain or discuss at length
    Synonym: spell out
  2. (intransitive, with on or upon) To make a statement, especially at length.
    He expounded often on the dangers of the imperial presidency.
    • 2021 December 29, Stephen Roberts, “Stories and facts behind railway plaques: Evesham (1870)”, in RAIL, number 947, page 59:
      Fowler was also interested in metallurgy and the use of new materials that could withstand greater stresses, something he expounded on when giving his presidential address to the new Institution of Mechanical Engineers in 1927.

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Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “expound”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)