clue·less \ˈklülə̇s\adjective 1.: having or providing no clue < a clueless case for the police to solve > 2.: completely or hopelessly bewildered, unaware, ignorant, or foolish < clueless about what they want > • clue·less·ly\-lē\adverb • clu·less·ness\-nə̇s\noun