Of or relating to vapour; also, having the characteristics or consistency of vapour.
Breathing out or giving off vapour.
Of a place: filled with vapour; foggy, misty.
Of a thing: covered or hidden by vapour, fog, or mist.
An adjective "vaporous" describes something that lacks depth or substance, is insubstantial and vague, or refers to thin and translucent clothes or fabric.
Feeling melancholy; experiencing the vapors.