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1. Considerable in importance, value, degree, amount, or extent: made a substantial improvement; won by a substantial margin.
2. Solidly built; strong: substantial houses.
3. Ample; sustaining: a substantial breakfast.
4. Possessing wealth or property; well-to-do.
a. Of, relating to, or having substance; material.
b. True or real; not imaginary.
6. Achieving the goal of justice itself, not merely the procedure or form that is a means to justice: principles of substantial justice.
[Middle English substancial, from Old French substantiel, from Latin substantiālis, from substantia, substance; see substance.]
sub·stan′ti·al′i·ty (-shē-ăl′ĭ-tē), sub·stan′tial·ness (-shəl-nĭs) n.