The Confusion Between Meaning and Naming in Plato's Argument Against Universals

He says there's a huge gulf between meaning and naming, even in the case of a singular term which is genuinely a name of an object. One way to summarize this beginning question about Pegasus and non being is he calls it a confusion betweenmeaning and naming. He argues against universals as well that at least is the first move against someone who says you can use words that mean something but don't name anything.