The definition of a “European state” could be interpreted to include Canada. For example:
European State
A sovereign nation whose core cultural, political, legal, and social institutions are fundamentally shaped by European historical experiences and intellectual traditions.
I’m not reading it being phrased as unequivocal as the title implies.
Though I think the idea that Canada would really join is a bit ridiculous.
Only European states can apply for EU membership.
The definition of a “European state” could be interpreted to include Canada. For example:
European State
A sovereign nation whose core cultural, political, legal, and social institutions are fundamentally shaped by European historical experiences and intellectual traditions.