frostier; frostiest
2
: covered or appearing as if covered with frost : hoary
… a man of 65, with frosty eyebrows and hair …—
Nan Robertson
3
: marked by coolness or extreme reserve in manner
… his smile was distinctly frosty.—
Erle Stanley Gardner
plural -es
: the quality or state of being frosty or frigid
often criticized for his excessive frostiness toward modern art—
Newsweek
Love words? Need even more definitions?
Merriam-Webster unabridged



