Aha! The mystery is solved. It is an Americanism, and that is why it is not in my Canadian dictionary. Canadian dictionaries, quite properly, scorn the more obscure Americanisms. ;-) The term "bloviate" first appeared around 1850-55, and was a concocted psuedo-Latin term, meaning:

"to speak pompously"

"to orate verbosely and windily"

It was popularized into general usage by Warren G. Harding in the 1920s.

And that is why it is not in a Canadian encyclopedic dictionary.

So, Amos, you accuse me of speaking pompously? Of orating verbosely and windily?

Ha! I freely admit to doing so. I take delight in doing so. I do it deliberately and frequently. Why? I am attempting, in my own small way, to match the sublime heights of bloviation achieved by the master of it on Mudcat...that master being yourself.

I regret to say that I am still falling a wee bit short of your own godlike capabilities in that regard, but I am sincerly trying. Give me time. Now that I have learned the Americanism "to bloviate", I have one more round of ammunition in my arsenal, as it were...

Expect some inspired bloviation when I have had time to replenish my energies fullsomely, for then I shall advance again to the field of honour, thesaurus in hand.