One of the Sahasranāma (Sahasranama; Thousand names) of God Viṣṇu (Vishnu). While explaining the meaning of the name Ūrdhvaga (Urdhvaga), Śaṁkarācārya (Samkaracharya), the commentator, says —
sarveṣāmupari tiṣṭhan ūrdhvagaḥ.
The place of God Viṣṇu is above all deva(gods) and dānava(demons), he is the greatest of all — in this sense, Ūrdhvaga is one of the names of Viṣṇu.