The Dictionary of Canadianisms on Historical Principles Online

Do I understand correctly that any dictionary “on Historical Principles” is a historical dictionary that shows a shift in meaning of words or phrases over time?

Yes, it also implies that the dictionary will contain citations that illustrate those shifts. It’s in contrast to dictionaries that focus on current usage.

As I’m sure Dave is aware, and you may be too, jtab, the original name of the OED was A New English Dictionary on Historical Principles.

Thanks Dave.  And thanks, Dr. T, I was not aware of the original title of the OED.

As ANEDOHPFMOTMCBTPS was commenced and published during the reign of VR, I look forward to the The Dictionary of Dallasitisms on Victoria Principals.

OP, you remind me of a 1980 piece of TV criticism by Clive James, who was often annoying but always very funny:

A medical reader writes to say that the BBC’s preoccupation with Dallas (BBC2 recurring) should not be called Dallasitis. Apparently the correct term is Dallasosis, meaning a condition brought about by excess Dallas. Dallasitis merely means that one’s Dallas has become inflamed.

But one’s Dallas has become inflamed. Also it is producing offshoots. One of these is called Knot’s Landing.....

How lovely to encounter another Clive James fan. The Silver Castle is one of my favourite novels.