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the alma mater(American)
the official song of a school, college or university We ended our class reunion by singing the alma mater.
your alma mater(formal)
the school, college, or university where you studied She has been offered the position of professor of international economic policy at Princeton, her alma mater.
Also, Alma Mater. The school or college one attended and, usually, graduated from, as in During football season I always check to see how my alma mater is doing. This expression sometimes refers to the institution's official song, as in I never did learn the words to my college's alma mater. The term is Latin for "kind mother." [c. 1800]