very thin, as thin as a hair
A fishing line made from hair.
The line along one's forehead where hair starts growing.
A very thin line in writing, drawing, or typography.
A very thin fissure.
Of clothes or fabric: thin and translucent; filmy, gauzy.
Of a thing: covered or hidden by vapour, fog, or mist.
Of a place: filled with vapour; foggy, misty.
Breathing out or giving off vapour.
Of or relating to vapour; also, having the characteristics or consistency of vapour.
Lacking depth or substance; insubstantial, thoughtless, vague.