expatiation

/ɪkˌspeɪʃiˈeɪʃən/
noun
  1. The act of speaking or writing at length and in detail about a subject.
    • His expatiation on the topic of climate change lasted the entire lecture.
    • The book is filled with lengthy expatiations on the author's personal philosophy.
    • I appreciate your expatiation, but could you give me a shorter summary?
Antonyms
What does "expatiation" mean? | whatsthatwordmean | whatsthatwordmean