A more thorough explanation:

Definition: Ignorantia (ig-nə-ran-shee-ə) is a Latin word that means ignorance. It is often used to refer to ignorance of the law.

For example, if someone breaks a law without knowing that it is a law, they cannot use their ignorance as an excuse. This is because ignorantia juris (ignorance of the law) is not a valid defense in court.

Ignorantia can also refer to ignorantia facti (ignorance of fact), which means not knowing something that is true. For example, if someone is not aware that a certain road is closed, they may accidentally drive down it and get a ticket. In this case, their ignorantia facti (ignorance of fact) may be a valid defense.

Overall, ignorantia is a term that highlights the importance of knowing the law and being aware of one's surroundings to avoid legal consequences.