Heavenly dancer. Her male counterpart is the gandharva, heavenly instrumental musician, and the Charana, the vocal musician.
The mother of the Apsaras is Muni, who is married with Kashyapa.
The most famous apsaras are Urvashi, Tara, Menaka, Hema, Gritachi, Adrika, Rambha, Pramlocha, Tilottama.
Indra sends an apsara whenever a sage/ascetic becomes too powerful through Tapas. The accumulated power lapses when the person concerned becomes ‚weak‘. He usually curses the apsara afterwards.
Read about a dance competition