disquisition

今年のＡＳＪ総会後の "H.I.H. Princess Akiko of Mikasa" のレクチャー録の最後にもう一つ覚えたい単語がありました。
It then fell to the British Ambassador to express the thanks of all of us to Her Highness for her most
interesting disquisition.
この "disquisition" の意味を辞書で見ます。
・Collins Dictionary: a formal written or oral examination of a subject: Re-reading the draft of this report, I was tempted to excise this disquisition from the text as being irrelevant.
・Merriam-Webster's Online Dictionary: a formal inquiry into or discussion of a subject : discourse: Adam Smith's celebrated disquisition on the factors contributing to the wealth of nations.
・Vocabulary.com: Disquisition is a long and elaborate word to describe a long and elaborate analysis of a given topic. If you launch into a disquisition about toe jam at a party, you'll soon be talking to a wall.
上記の引用個所の後に以前取り上げた意味の "repair" が出てきたので、ついでに引用しておきます。
Finally flowers were presented to each of the Princesses, and also to our hostess Mrs. Hitchens. Mr.
Hitchens then invited the assembled company to repair to the adjoining rooms for a buffet reception, which was launched by a toast proposed by our honorary patron. Ample time was provided for conversing with their Highnesses and with fellow-members in a most convivial atmosphere, forming a fitting conclusion to this memorable evening