Considerable in importance, value, degree, amount, or extent: won by a substantial margin.
Possessing wealth or property; well-to-do.
n.
An essential. Often used in the plural.
A solid thing. Often used in the plural.
[Middle English substancial, from Old French substantiel, from Latin substantiālis, from substantia, substance; see substance.] sub·stan'ti·al'i·ty (-shē-āl'ĭ-tē), sub·stan'tial·ness (-shəl-nĭs) n., sub·stan'tial·ly adv.