1. Excellent, brilliant, or very good: This is the most common meaning. It's used similarly to "amazing" or "fantastic" in American English.
* "That new restaurant is ace! The food was incredible."
* "The concert was ace! The band played all my favorite songs."
2. Skilled or talented: It can be used to describe someone who is good at something.
* "She's an ace tennis player."
* "He's an ace mechanic."
3. A small, insignificant amount: This is less common, but sometimes used to mean "a little bit".
* "I only got an ace of sleep last night."
* "I've got ace time for shopping."
4. "Ace of Spades" card in a deck of cards: This is a specific use, usually referring to the card game "Ace of Spades".
5. "Ace" can also be a shortening of "aces", which is a common slang term for "whips" or "lashes" (like a whip or a lash) in a riding crop: This is a more niche usage, primarily used in equestrian circles.
It's important to note that the context will always make it clear which meaning of "ace" is being used.