From the OED (that’s the Oxford English Dictionary, by the way):

Definitive is often used, rather imprecisely, when definite is actually intended, to mean simply ‘clearly decided’. Although definitive and definite have a clear overlap in meaning, definitive has the additional sense of ‘having an authoritative basis’. Thus, a definitive decision is one which is not only conclusive but also carries the stamp of authority or is a benchmark for the future, while a definite decision is simply one which has been made clearly and is without doubt..

The authoritative basis here is that, in a referendum, more people voted to leave than to remain. Does it get any more authoritative than that?

I’ll leave you to email the OED if you disagree with their definition.

Yeah, he is but he laid off barristering a couple of years ago. He now sits in majestic splendour as a judge, sending an endless stream of miscreants to chokey.

Cucking doesn't realise his big contradiction

First argues the vote was to leave the EU lock stock and barrel whatever the consequences, then ends by saying how much of a total disaster it all is

Don't you think people voted remain because of EXACTLY this situation we now find ourselves in?

We have probably got another 10 years of this s***e.

The 'end-game' means the 'start-game'.

I am sure I won't be around if it ever does end, and what a pointless disaster it all is.

It is Suez all over again, the same duplicity and self-delusion.

So many serious problems in the country all put on the sidelines while they tear themselves to pieces.

The deal is far more than the UK deserves.