Coolness, n.
1. The state of being cool; a moderate degree of cold; a moderate degree, or a want, of passion; want of ardor, zeal, or affection; calmness.
2. Calm impudence; self-possession. [Colloq.]
Shades of meaning
Fernald lists coolness only as an antonym, under amazement, attachment.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given