Of course beer is a beverage, as the majority of its composition is water; however, given that it's also made with cereal grains, hops and yeast, all of this combined goodness is oftentimes a meal in itself. Ever have a rich, luscious beer that just about fills you up on its own? You know what we're talking about.
The definition of food doesn't say anything about "chewing." Beer is food for the soul and mind. There's a reason why you feel good after you drink a delicious beer. The hops act as a mild sedative (hops can also be found in teas), the carbonation refreshes and livens the palate, the alcohol loosens the brain from the grip of daily life; and you relax. You feel good. And it only takes one beer to achieve this, if you allow it to. Pair beer with life!
Many beers, especially those that are unfiltered and/or conditioned in their vessel, will contain yeast cells, which are living, single-celled organisms that are responsible for creating carbonation and alcohol in beer. And oftentimes they are still alive in your beer, providing rich amounts of Vitamin B. It's like having food within food!