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Upanisads--: the philosophical division of the VEDAS, meant for bringing the student closer to understanding the personal nature of the Absolute Truth.
Utsaha-: enthusiasm.
Uttama-adhikari--: a first-class devotee who is very advanced in devotional service and has attained pure Krishna consciousness, the highest stage of God realization.
Uttama bhakti--: unalloyed devotion unto the Supreme Personality of Godhead.
Uttardyana--: Period when the sun passes toward the northern side, in which the deities of fire and effulgence control the atmosphere, the opportune time for persons who have realized the Transcendence to leave their material bodies and reach the spiritual world known as Vaikuntha.