A 1-Star hotel provides a limited range of amenities and services, but adheres to a high standard of facility-wide cleanliness.
A 2-Star hotel provides good accommodation and better equipped bedrooms, each with a telephone and attached private bathroom.
A 3-Star hotel has more spacious rooms and adds high-class decorations and furnishings and color TV. It also offers one or more bars or lounges.
A 4-Star hotel is much more comfortable and larger, and provides excellent cuisine (table d'hote and a la carte), room service, and other amenities.
A 5-Star hotel offers most luxurious premises, widest range of guest services, as well as swimming pool and sport and exercise facilities.
Read more: http://www.businessdictionary.com/definition/hotel.html#ixzz3rdEkirhC