"SENSEVAL: An Exercise in Evaluating Word Sense Disambiguation Programs" Adam Kilgarriff University of Brighton There are now many computer programs for automatically determining which sense a word is being used in. One would like to be able to say which were better, which worse, and also which words, or varieties of language, presented particular problems to which programs. However evaluation presents a range of problems. In this paper I briefly discuss the problems, and then describe a pilot evaluation exercise (`SENSEVAL') taking place under the auspices of ACL SIGLEX (the Lexicons Special Interest Group of the Association for Computational Linguistics) and EURALEX (European Association for Lexicography) in the course of 1998.