{ WHAT IS A BENCH? }

 a long seat for several people, typically made of wood or stone. http://oxforddictionaries.com/

A bench is a piece of furniture, on which several people may sit at the same time. Benches are typically made of wood, but may also be made of metal, stone, or synthetic materials. Many benches have arm and back rests; some have no back rest and can be sat on from either side. In public areas, benches are often donated by persons or associations, which may then be indicated on it. http://en.wikipedia.org/

and my personal favorite means of reference..

a combination of either wood or steel, it can also be made out of cement, shaped like a long chair with low back support. these are meant for people to sit on and can be found near, around, or inside most public places. most benches are strong enough to support the weight of the fatest person in the world.(well maybe not that strong) http://www.urbandictionary.com/