n. Belief that actuality and existence are co‐extensive: i.e., that only actual things exist, that there are not, in addition to the actual, any possibility (possible entities).
The Century Dictionary and Cyclopedia
n. In metaphysics, the doctrine that all existence is truly active or spiritual, and not dead or inert.
Word Usage
"His actualism is a distinctly metaphysical actualism: singularis."