The purpose of this research was to provide norms for ambiguous spanish words: homographs (words with different meanings unrelated) and polysemous words (words with meanings related). 1n the first study, 104 subjects were asked for defining as many meanings as they knew of a sample of 152 homographs. 1n the second study a sample of 61 polysemous words was presented to 96 subjects who had to build as many sentences as meanings they knew for words. For the purpose of determining the normative frequency of responses representing alternative meanings of the stimulus word we computed the percentage of subjects who answered each meaning. The data were analyzed to determine several indexes: number of meanings, length, graphemic frequency, lexical frequency, and dominance (meanings accessed simultaneously) or equiprobability (equally likely meanings) of each sense for ambiguous words.