I would add another dimension to the definition.
I woudl say that for CLW to be 100% true, there should be no mother-child separation.
also no bottles, no pacifiers.
For example, I work2-3 days/week. When I am at home, baby has unlimited access to th breast day and night. But the fact that he can't nurse when I am not home (even if he is getting my milk in a bottle on demand), will result in premature weaning, even if weaning happens at 4-5 years, it would be still earlier then without separation with me.
I nursed DS1 until 2,5 years. We weaned during the 8th month of my second pregnancy. Now DS2 is 13 months old.
I really feel that DS1 weaned prematurely and I missed nursing as a parenting tool.
I hope that i would be able to nurse DS2 until he weans himself.....but I know it wouldn't be CLW, because I work outside (despite co-sleeping, night feeding on demand ect)