A system of classifying according to quality or merit or amount(noun)
WordNet. Princeton University. 2010.
Use "rating system" in a sentence
"The National Legion of Decency came up with a film rating system that was a precursor to the current industry-sponsored rating systems for films, television and video games."
"That night, at a corner restaurant in the heart of the touristy town, we had a meal that would have stood only a few points lower than La Baita and Locanda Santa Ana in a rating system of the trips culinary highlights."