Definition #2 clearly refers to and includes an industrial chemical process as you can see in the usage examples and synonyms. This is how language works. One w

Definition #2 clearly refers to and includes an industrial chemical process as you can see in the usage examples and synonyms. This is how language works. One word can have many meanings and shades of meanings. When people talk about chemicals in food, everyone knows the definition being used is in the sense of industrially produced chemicals that are not present in plants and animals. Pointing out that other definitions of the word exist is as irrelevant to the conversation as if you were talking about eating oranges and I said, well actually that’s a color and you can’t eat it.