SUBSTAN'TIAL, a. Belonging to substance; real; actually existing.
If this atheist would have his chance to be a real and substantial agent, he is more stupid than the vulgar.1. Real; solid; true; not seeming or imaginary. If happiness be a substantial good. The substantial ornaments of virtue.2. Corporeal; material. The rainbow appears like a substantial arch in the sky.3. Having substance; strong; stout; solid; as substantial cloth; a substantial fence or gate.4. Possessed of goods or estate; responsible; moderately wealthy; as a substantial freeholder or farmer; a substantial citizen.