OSSA (mod. Kissovo or Kissavo), a mountain in the district of Magnesia in Thessaly, between Pelion and Olympus, from which it is separated by the valley of Tempe. Height about 6400 ft. The Giants are said to have piled Pelion upon it in their attempt to scale Olympus.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)