group of islands in the Malay Archipelago, consisting of two smaller groups: (Sumatra, Java, Borneo, Sulawesi, & small nearby islands) & (Bali & islands stretching east through Timor)
See Sunda Islands in American Heritage Dictionary 4
A group of islands of the western Malay Archipelago between the South China Sea and the Indian Ocean. The Greater Sunda Islands include Sumatra, Borneo, Java, and Sulawesi; the Lesser Sunda Islands lie east of Java and extend from Bali to Timor. Sumatra and Java are separated by the Sunda Strait, a narrow channel linking the Indian Ocean with the Java Sea.