a mentally defective person with an exceptional skill or talent in a special field, as a highly developed ability to play music or to solve complex mathematical problems mentally at great speed.
Main Entry: idiot sa·vant Pronunciation: 'E-"dyO-sä-'vän; 'id-E-&t-s&-'vänt, -'vant Function: noun Inflected Form: pluralidiots savants/-"dyO-sä-'vän(z); -&ts-s&-'vänt(s), -'vant(s)/oridiot savants : a mentally retardedperson who exhibits exceptional skill or brilliance in some limited field (as mathematics or music)