Abstract: This paper describes automatic techniques for mapping 9611 semantically classified English verbs to WordNet senses. The verbs were initially grouped into 491 semantic classes based on syntactic categories; they were then mapped into WordNet senses according to three pieces of information: (1) prior probability of WordNet senses; (2) semantic similarity of WordNet senses for verbs within the same category; and (3) probabilistic correlations between WordNet relationship and verb frame data. Our techniques make use of a training set of 1791 disambiguated entries, representing 1442 verbs occurring in 167 of the categories. The best results achieved .58 recall and .72 precision, versus a lower bound of .38 recall and .62 precision for assigning the most frequently occurring WordNet sense, and an upper bound of .75 recall and .87 precision for human judgment. Acknowledgements: All three authors are supported, in part, by PFF/PECASE Award IRI-9629108, DOD Contract MDA904-96-C-1250, and DARPA Contracts N66001-97-C-8540 and N66001-00-2-8910. Rebecca Green is supported, in part, by a National Science Foundation Graduate Research Fellowship. We are indebted to Philip Resnik for his assistance with experimental runs of his algorithm on the data and his useful commentary in the preparation of this document. (Submitted to 39th Annual Meeting of the Association for Computational Linguistics, Toulouse France.) (Also cross-referenced as LAMP TR-061) (Also cross-referenced as UMIACS TR-2001-02)