METEOR (Metric for Evaluation of Translation with Explicit ORdering)'s a metric for the evaluation of machine translation output. The metric's based on the harmonic mean of unigram precision and recall, with recall weighted higher than precision. It also has several features that aren't found in other metrics, such as stemming and synonymy matching, along with the standard exact word matching. The metric was designed to fix some of the problems found in the more popular BLEU metric, and also pro… (More on Meteor)