Dyuloka is a Sanskrit term for "heavenly world". It appears in the Vedic text Shatapatha Brahmana, in verses 16.6.1.8–9 as well later texts.[1] Its root is Dyu (द्यु) which in the Rigveda means "heaven, shining, sky".[2][3]
The term appears in the Upanishads, where it connotes "sky or heaven", as in sun lighting it up. For example, in the commentary to the Yajnavalkya-Gargi dialogue of section 6.2 in the Brihadaranyaka Upanishad, Radhakrishnan translates Dyuloka as heaven.[4]
In another context, Dyuloka is the realm of existence (samsara) where souls are reborn as gods and goddesses, to live out a life based on one's karma before they die again, according to the Devi-Bhagavata Purana.[5]