maybe definitions 1 and 2. certainly 4. DEFINITELY not 6. actually maybe "it's cool if you don't want to talk about it". that fits here.
cool (kl)
adj. cool·er, cool·est
1. Neither warm nor very cold; moderately cold: fresh, cool water; a cool autumn evening.
2. Giving or suggesting relief from heat: a cool breeze; a cool blouse.
3. Marked by calm self-control: a cool negotiator.
4. Marked by indifference, disdain, or dislike; unfriendly or unresponsive: a cool greeting; was cool to the idea of higher taxes.
5. Of, relating to, or characteristic of colors, such as blue and green, that produce the impression of coolness.
6. Slang
a. Excellent; first-rate: has a cool sports car; had a cool time at the party.
b. Acceptable; satisfactory: It's cool if you don't want to talk about it.
7. Slang Entire; full: worth a cool million.
( rachelswipe with a fork, Thu 17 Nov 2011, 10:32, 1 reply, 14 years ago)

I prefer Del Close and John Brent's definition

( tangledupinblue hairy badge with moving eyes, Thu 17 Nov 2011, 10:37, Reply)