1A society of amateur musicians, especially one attached to a German or US college.
- ‘By the 1730s coffee had become the hot new drink in Leipzig, and Bach and his collegium of music students would meet to perform each Friday evening at Zimmerman's Coffee House.’
- ‘University towns established a number of collegia musica, and concert societies came into being.’
2historical An advisory or administrative board in Russia.
Late 19th century: from Latin, literally association.