Ah, I suppose I would have less concern with this more broad definition of slavery. A child being forced to do chores would qualify as slavery in this case, right?
Human language and human behavior are both very squishy, so it's unlikely we'll come up with an objective definition that everyone can agree upon in all cases. I wouldn't define slavery strictly in terms of the law because then things like human trafficking are excluded. Cast your net wide enough and sure, children being forced to do chores would qualify.
At some point you just have to draw an arbitrary line in the sand and say "this is slavery, that is not".
