01 a. Full of foam or froth, or consisting of froth or light bubbles; spumous; foamy.
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1.
Full of foam or froth, or consisting of froth or light bubbles; spumous; foamy.
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2.
Not firm or solid; soft; unstable.
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3.
Of the nature of froth; light; empty; unsubstantial; as, a frothy speaker or harangue.