Emily Dickinson Lexicon

cool (cooler), adj. [OE < L. gel-, cold; see cold, adj.] (webplay: air, blood, blow, cold, day, evening, finger, fond, friend, hot, light, lose, love, morning, tongues, water).

1. Low in temperature; [fig.] calmer; more serene; more peaceful.
2. Moderately cold; not warm to the touch; [fig.] lacking physical warmth because of death.
3. Detached; aloof; passionless; unmoved; indifferent; confident; self-assured; lacking emotion; not heated by passion.
4. Calm; composed; serene; sans excitement; without excessive emotion.
5. More chilling; more aloof; more detached; more passionless; less moved by emotion.
6. Easier; more endurable.
7. More persistent; more piercing; more noticeable.
8. Dull; boring; lusterless; tepid; not fulfilling.