Which of the following correctly defines 'treif'?

The term 'treif' is used in Jewish dietary laws to describe food that is not kosher, meaning it does not conform to the dietary rules set forth in the Torah. These dietary restrictions specify what foods are permissible for Jews to eat and how they should be prepared. In contrast to kosher foods, which are those that meet the necessary requirements for consumption, treif encompasses items that are forbidden.

Understanding this term is crucial for those studying religious and ethnic foods, as it highlights the cultural and spiritual significance of dietary practices within Judaism. The option mentioning 'kosher' refers to food that adheres to these laws, while 'permissible' and 'blessed food' do not accurately capture the essence of treif, which fundamentally relates to what is prohibited. Therefore, identifying treif as not kosher underscores its definition and importance in the context of Jewish dietary observance.