A Jewish seminary is a Jewish educational institution.
A yeshiva is an institution for boys or young men focused on the study of religious texts, especially Torah study and the Talmud. These include mesivta for high school-aged boys and beit midrash or yeshiva gedola for men of college age.
A midrasha is an institute of Jewish studies for women, roughly equivalent to yeshiva. In Israel a midrasha that also offers academic degrees is sometimes called a machon. In the United States, midrasha may also be co-educational.