dissimilar (from/to somebody/something) (formal) not the same These wines are not dissimilar (= are similar). The two languages are completely dissimilar from each other. opposite similar Word Origin late 16th cent.: from dis- (expressing reversal) + similar, on the pattern of Latin dissimilis, French dissimilaire.Extra examples His views are not dissimilar from those of the Health Minister. The way of life here is not altogether dissimilar to that in other parts of Europe. These wines are not dissimilar. They had spent their childhoods in highly dissimilar circumstances.