Definition - What does Chandogya Upanishad mean?
The "Chandogya Upanishad" is a Sanskrit text that has served as a core text for the Vedanta school of Hinduism. The name is derived from the Sanskrit, chanda, meaning “poetic meter,” and Upanishad, meaning “sitting at the foot of.”
It is considered one of the oldest Upanishads and consists of eight chapters. The overarching theme is the significance of chants, speech and song to human salvation and knowledge. The "Chandogya Upanishad" discusses the primordial syllable, Om, that is regularly used in the practice of meditative yoga.
Yogapedia explains Chandogya Upanishad
Within it's eight chapters, the "Chandogya Upanishad" describes many aspects of Hindu philosophy including concepts such as the chanting of Om, good and evil, space, the universe as a whole, the Soul and Self, oneness with the world and Brahman. It is a poetic text with a metered structure, focusing on song, language and chanting.
Much of the same content within the Chadogya Upanishad is also found within the "Brihadaranyaka Upanishad," though not in poetic form.
The exact date of composition is unclear and disputed. Most scholars believe that the text was composed before the start of Buddhism. Many of the philosophical principles outlined in the "Chandogya Upanishad" are similar to yoga philosophy.