iwpoe wrote:

What distinguishes it from nothing, then?

Nothing .  But nothing has a whole bunch of connotations and potential assumptions that the term 'Dynamic Quality' does not.  Nothing sounds cold, dead and empty.   “Dynamic Quality,” has opposite connotations. It suggests warmth, life, fullness and flexibility.

iwpoe wrote:

Would you say it's *defined* by its "warmth, life, fullness and flexibility"?

Yes.  And again we could say I'm saying too much about Dynamic Quality.  But to speak to what I think you're trying to get at - DQ  is defined by the term 'Dynamic Quality' or defined by the term nothing or any other words we use to denote it. But according to the  MOQ  these are all static quality.  The MOQ itself is a static intellectual value pattern (static quality) including the terms 'Dynamic Quality' and static quality.

Dynamic Quality  is both undefinable and infinitely definable for definition never exhausts it.