Milk is a dairy drink.
Dairy, because ice cream is a milk product
Cheddar is a cheese, a dairy product.
Cheddar is a cheese, a dairy product.
Yes. Any dairy product is.
From the perspective of kashrut (kosher food laws), dairy refers to any food product made form milk of any animall. This includes derivatives such as whey and dairy lactose.
Butter is still classed by retail and supply chain as a chilled dairy product.
It is included in the dairy component on the nutrition pyramid. So, it is food.
Cheese
food and drink
Australia has a substantial dairy industry and produces milk, cream, butter, a huge variety of cheeses, yoghurt and all of the "fast food/convenience food" variants.
Cheese is a dairy product you can put on food.