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1. To be sophisticated, fashionable, or knowledgeable of the latest trends. A lot of people didn't think I was cool in high school just because I was in band and the computer club. Ugh, I hate it when my parents try to be cool. Like, you're not teenagers—stop pretending to be! We dated for a while, but I always felt like she was way too cool for me.
2. To be or remain calm, composed, or unflustered. Commonly used as an imperative. You've got to be cool when the boss comes in. Don't let him see that anything is wrong! She was so cool when she made the request that I didn't think anything of it at the time. A: "There's a security checkpoint up ahead! What if they search us and find the loot?" B: "Be cool, man! They'll definitely search us you're freaking out."
3. To be very exciting or interesting. I used to play the oboe until I realized that girls think the electric guitar is cool. A: "I just booked a flight to Paris!" B: "Wow, that's so cool! When are you going?" It was pretty cool getting to fly in a helicopter.
4. To not be a problem. A: "I'm sorry for what I said earlier." B: "It's cool, man. Don't worry about it."
slang I'm fine or OK. A: "Can I get you something to drink?" B: "Nah, I'm cool. Thanks, though." I'm cool, how've you been?
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
Inf. I'm fine. Bob: How you been? Fred: I'm cool, man. Yourself? Bob: The same. Father: How are you, son? Bill: I'm cool, Dad. Father (joking): So should I turn up the heat?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.