elucidation (the word Kaumudī being metaphorically used like other words of similar import at the end of grammatical commentaries and other explanatory works to imply that the book so designated throws much light on the subject of which it treats) (MW)
festival in honour of Kārttikeya held on that day (MW)
moonlight (MW)
moonshine (MW)
name of a river (MW)
the day of full moon in the month Kārttika (sacred to Kārttikeya) (MW)