Meanings
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1
adj
filled with, consisting of, or resembling vapor; misty or gaseous
A vaporous haze drifted above the marsh at dawn.
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2
adj
so thin, light, or translucent as to resemble vapor
The dancer's vaporous costume moved like smoke across the stage.
Thesaurus
Etymology
From Middle English vaporous and Late Latin vaporosus, "full of steam," based on Latin vapor, "exhalation, smoke, steam," + -osus, "full of." In modern English it is also transparently vapor + -ous; British spelling normally retains vaporous even though the noun is vapour.