1. Jail/Prison: This is the most common meaning of "cana" in Spanish slang. It's used to refer to a place of detention.
2. Cannabis: In some regions, "cana" can refer to cannabis or marijuana.
3. White hair: "Cana" can also mean "gray hair" or "white hair," although this is less common.
4. Chalice: "Cana" can also refer to a chalice, a large cup used in religious ceremonies. This usage is more formal and less common than the others.
To determine the correct meaning, you need to look at the context in which "cana" is used.