All warfare requires physical violence. If it's not physically violent, “warfare” is being used as a loose metaphor, not a factual description.
> We use the term cyber warfare as another example.
Cyberwarfare not directed at or effectuating physical destruction of materiel and/or persons is merely metaphorical rather than actual warfare, or is part of the information component of a broader war. (OTOH, cyberwarfare can be, in fact, a direct means of achieving physical destruction of materiel and/or persons.)
That is still a form of warfare.
Sanctions aren’t hindering anyones property, it’s just refusing to do business with your hated enemy.
I can see the point you're making about sanctions being similar to siege warfare. The main difference being that sieges separate you from your own forces and allies in a way that sanctions don't.
And I suppose the difference between a siege and a blockade is pretty much whether or not you fire those big guns into the city.
Axlees post above reads in amazingly bad faith. It's just a "oh, you're not using this nonstandard definition you fool" type sarcastic response to dismiss the point, contributing nothing in itself.
When people say war, the vast majority of the population will take it to mean boots on the ground, military involved, bullets flying war. The sarcastic