1. ಸಿಡಿ (SiDi) - This is the common transliteration of "CD" in Kannada, meaning Compact Disc.
2. ಸಿಡಿ (SiDi) - This can also be used to refer to "ಸಿಡಿ" (SiDi), a type of traditional Indian musical instrument. It is a small, circular, hand-held drum used in classical and folk music.
Therefore, the meaning of CD in Kannada depends on the context in which it is used. If you're talking about a data storage medium, it's the Compact Disc. If you're talking about a musical instrument, it's the "ಸಿಡಿ" drum.