What does the word "sushi" refer to?

Sushi is a food preparation originating in Japan, consisting of cooked vinegared rice combined with other ingredients such as raw seafood, vegetables and sometimes tropical fruits. Ingredients and forms of sushi presentation vary widely, but the ingredient which all sushi have in common is rice (also referred to as shari or sumeshi. Sushi can be prepared with either brown or white rice. It is often prepared with raw seafood, but some common varieties of sushi use cooked ingredients or are vegetarian.