a. [f. VAPOUR sb.] Destitute of, free from, vapor.
1842. Tioga Eagle (Wellsborough, PA), 23 Nov., 2/2. After the lapse of another minute the sky, to his astonishment, appears as deeply blue, as purely vaporless as ever.
1850. B. Taylor, Eldorado, xxxiii. II. 99. The walls of white rock … stand out distinctly in the vaporless atmosphere.
1860. Maury, Phys. Geog., xi. § 645. And why should these winds be almost vaporless?
1884. Q. Rev., April, 339. The deep purple of a vapourless sky.
