1. Coin: Most commonly, "dime" refers to a ten-cent coin in the United States.
2. A small amount: You might use "dime" to describe something very small, such as a "dime-sized piece of chocolate". This refers to the coin's small size.
3. A tenth of a dollar: "Dime" can also be used to refer to one tenth of a dollar, especially in financial contexts. For example, "The cost of a cup of coffee went up by a dime".
4. Slang for "good": In some slang, "dime" can mean "good" or "attractive". This is particularly common when referring to someone's physical appearance.
Which meaning is appropriate depends on the context.