Noun
(Hinduism, philosophy) The second of three (or more) bodies that make up the fully embodied human in various Hindu philosophies.
(occult, parapsychology) The embodiment of the soul or mind; part of the bodymind of the human being in syncretic, esoteric philosophy.
(occult, theosophy) Those parts of the septenary, the 'seven principles of man' which constitute each human being, contrasted with the gross body, the physical human body.
Source: en.wiktionary.orgWithin the physical body every human being has a subtle body made up of invisible structures and energies (kundalini, nadis, and chakras); and within the subtle is the causal body out of which the subtle and physical bodies are formed. Baba Hari Dass
In these traditions, there are seven basic chakras, and they all exist within the subtle body, overlaying the physical body. Source: Internet
Chakras are believed to be part of the subtle body, not the physical body, and as such, are the meeting points of the subtle (non-physical) energy channels called nadi. Source: Internet
The two terms are different spellings in the Latin alphabet of the same Tibetan phrase (Wylie: sku mnye), which literally means "massage of the subtle body". Source: Internet
Nadi are believed to be channels in the subtle body through which the life force ( prana ) (non-physical) or vital energy (non-physical) moves. Source: Internet
The subtle body linga sarira he would not regard as permanent and he would deny it a direct control over external matters. Source: Internet