Word definition: substantial
[adj] having substance or capable of being treated as fact; not imaginary; "the substantial world"; "a mere dream, neither substantial nor practical"; "most ponderous and substantial things"- Shakespeare
[adj] being the essence or essential element of a thing; "substantial equivalents"; "substantive information"
[adj] providing abundant nourishment; "a hearty meal"; "good solid food"; "ate a substantial breakfast"
[adj] of good quality and condition; solidly built; "a solid foundation"; "several substantial timber buildings"
considerable, essential, hearty, in essence, material, real, satisfying, significant, solid, sound, strong, substantive, wholesome
insubstantial, unreal, unsubstantial
\Sub*stan"tial\, a. [F. substantiel, L. substantialis.] 1. Belonging to substance; actually existing; real; as, substantial life. --Milton. If this atheist would have his chance to be real and substantial agent, he is more stupid than the vulgar. --Bentley. 2. Not seeming or imaginary; not illusive; real; solid; true; veritable. If happinessbe a substantial good. --Denham. The substantial ornaments of virtue. --L'Estrange. 3. Corporeal; material; firm. ``Most ponderous and substantial things.'' --Shak. The rainbow [appears to be] a large substantial arch. --I. Watts. 4. Having good substance; strong; stout; solid; firm; as, substantial cloth; a substantial fence or wall. 5. Possessed of goods or an estate; moderately wealthy; responsible; as, a substantial freeholder. ``Substantial yeomen and burghers.'' --Sir W. Scott.