expound - definition and synonyms

verb [intransitive/transitive] very formal 

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/ɪkˈspaʊnd/
present tense
I/you/we/theyexpound
he/she/itexpounds
present participleexpounding
past tenseexpounded
past participleexpounded
  1. to explain something or to express your opinion about it in detail

    It will be an opportunity to expound the ideas he has been developing.

    expound on/upon:

    He continued to expound on the failings of our educational system.