The term "non-emptiness" appears in the literature. For example from Chi-tsang (madhyamaka):
When the sutras speak of "the emptiness of visible form" this refers to its emptiness and lack of a true substantive nature; therefore it is called empty. It does not mean that conventional visible reality is empty (nothingness?). Since the substantive nature is an empty nothingness, therefore it is called empty. This is the real truth. The non-emptiness of conventional reality is called the worldly truth.
I just mean the opposite of emptiness.
Is non-emptiness empty, and in what way?