Noun
gatha (plural gathas)
(Buddhism) A poem or mantra, especially one recited mentally as part of meditation or mindfulness practice.
Gatha (plural Gathas)
(Zoroastrianism) Any of the 17 hymns included in the Avesta believed to have been composed by Zoroaster himself.
Their use and ancient roots are attested by sutras being mentioned in larger genre of ancient non-Vedic Hindu literature called Gatha, Narashansi, Itihasa and Akhyana (songs, legends, epics and stories). Source: Internet