Dairy, used as a noun means, a place where cows (or, I suppose, goats) are milked. Used in a sentence:
The heroine in Tess of the D’Urbervilles found work, and, briefly, love, in a dairy.
Dairy can also be used as an adjective to describe the products made therein, but, I would contend, does not stand on its own as a noun to describe those products.
So, too, with the word overweight. You can be overweight, just as you can be tan, tall, crazy, or glad. Those are adjectives.
If you are unclear on the concept of adjectives versus nouns, please review:
I’m simply not buying the transmogrification of the adjective overweight into a noun.
You know who I think is behind it? The pharmaceutical industry.You can’t create a drug (or a diagnostic code) for an adjective, but a noun, well, you can drug and treat the hell out of a noun.
Won’t you join me in stopping the insanity? Overweight should remain an adjective.