An energy node in the human body. The seven main chakras are described as being aligned in an ascending column from the base of the spine to the top of the head. Each chakra is associated with a certain colour, multiple specific functions, an aspect of consciousness, a classical element, and other distinguishing characteristics.
In Sanātana/Hindu and tantric/yogic traditions and other belief systems, a chakra (IAST: cakra) is an energy point or node in the subtle body. Chakras are part of the subtle body, not the physical body, and as such are the meeting points of the subtle (non-physical) energy channels called nadis. Nadis are channels in the subtle body through which the life force (prana) (non-physical) or vital energy (non-physical) moves. Various scriptural texts and teachings present a different number of chakras. There are many chakras in the subtle human body according to the tantric texts, but there are seven chakras that are considered to be the most important ones.
Their name derives from the Sanskrit word for "wheel" or "turning", but in the yogic context a better translation of the word is 'vortex or whirlpool'.
The concept of chakra features in tantric and yogic traditions of Hinduism and Buddhism.
Example video: Ram Dass: 08/09/69. As you unlock your chakra centers you will have more energy. You become more and more open to the world around you.
Example via www.ramdass.org: Chakras in the Body