Unconditioned, a.
1. Not conditioned or subject to conditions; unconditional.
2. (Metaph.)
Not subject to condition or limitations; infinite; absolute; hence, inconceivable; incogitable. Sir W. Hamilton. The unconditioned (Metaph.), all that which is inconceivable and beyond the realm of reason; whatever is inconceivable under logical forms or relations.
Shades of meaning
Fernald has no entry of its own for unconditioned; he lists it under infinite.
He lists it without comment; the entries above explain its neighbors.