#1 substantial s. [significant] fairly large; "won by a substantial margin". wn
#2 substantial s. [substantive] having a firm basis in reality and being therefore important, meaningful, or considerable; "substantial equivalents". wn
#3 substantial a. [real, material] 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. wn
#4 substantial s. [hearty, satisfying, solid, square] providing abundant nourishment; "a hearty meal"; "good solid food"; "ate a substantial breakfast"; "four square meals a day". wn
#5 substantial s. [solid, strong] of good quality and condition; solidly built; "a solid foundation"; "several substantial timber buildings". wn
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