Years ago I heard one definition of yoga as meaning “oneness with god.” In India, you may be pretty certain it’s not oneness with “The One and True God,” but the Deceiver. Don’t play with fire.
See definitions 1 and 3 below from the very secular dictionary.com
noun (sometimes initial capital letter)
1. a school of Hindu philosophy advocating and prescribing a course of physical and mental disciplines for attaining liberation from the material world and union of the self with the Supreme Being or ultimate principle.
2. any of the methods or disciplines prescribed, especially a series of postures and breathing exercises practiced to achieve control of the body and mind, tranquillity, etc.
3. union of the self with the Supreme Being or ultimate principle.