If it didn't come out of the teat of an animal, it isn't milk.
Milk can defined as any white fluid or can specific to the milk of lactating mammals.
I love cow milk products. Especially cheeses. I can no longer eat them.
I don’t drink anything called milk. But I do use products of things like coconut milk in cooked products. I eat vegan margarine and coffeemate in my coffee. I’d prefer not to. But I have no choice for health reasons.