Here's my thought about halal food

Halal (حلال, ḥalāl, Halaal) is an Arabic term designating any object or an action which is permissible to use or engage in, according to Islamic law. It is the opposite of haraam. The term is widely used to designate food seen as permissible according to Islamic law (Sharia) - ( (الشريعة الإسلامية). It is estimated that 70% of Muslims worldwide follow halal food standards^[1] and that the global halal market is currently a $580 (U.S.) billion industry^[2].

The use of the term varies between Arabic-speaking communities and non-Arabic-speaking ones.

In Arabic-speaking countries, the term is used to describe anything permissible under Islamic law, in contrast to haraam, that which is forbidden. This includes human behavior, speech communication, clothing, conduct, manner and dietary laws.

In non-Arabic-speaking countries, the term is most commonly used in the narrower context of just Muslim dietary laws, especially where meat and poultry are concerned, though it can be used for the more general meaning, as well.