Czechism noun2 •A word or idiom of the Czech language (that has been borrowed by another language).Examples include East Slavicisms in Polish Yiddish (and vice versa) and Czechisms in Polish and Eastern Yiddish dialects. — 1987 •(historical) Czech nationalism.They regarded Thun as the representative of "Czechism" who had placed all his cards on the convocation of a national parliament. — 1980 formsCzechisms