Something substantial is large in size, number, or amount: If you want to say someone spent a lot of money without being too specific, you could say they spent a substantial amount of money.
The adjective substantial derives from the Latin substantia "substance," which means "stuff." A substantial meal is large enough to satisfy hunger. A substantial structure is strongly made or built. And a substantial man possesses wealth and property. Related to this last sense, "a man of substance" refers to a wealthy man with property.
adj having substance or capable of being treated as fact; not imaginary
derived from or composed of matter
insubstantial, unreal, unsubstantial
lacking material form or substance; unreal
aerial, aeriform, aery, airy, ethereal
characterized by lightness and insubstantiality; as impalpable or intangible as air
lacking in substance
consisting of or containing string or strings
not consisting of matter
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