Akasha (or Akash, Ākāśa, आकाश) is the Sanskrit word meaning “aether” in both its elemental and metaphysical senses.
In Hinduism Akasha means the basis and essence of all things in the material world; the first material element created from the astral world (Air, Fire, Water, Earth are the other four in sequence). It is one of the Panchamahabhuta, or “five elements”; its main characteristic is Shabda (sound). In Sanskrit the word means “space”, the very first element in creation. In Hindi, Marathi and Gujarati, and many other Indian languages, the meaning of Akasha has been accepted as sky.
Aggregate elemental process, free space or void, also related to the property of sound.
The Nyaya and Vaisheshika schools of Hindu philosophy state that Akasha or aether is the fifth physical substance, which is the substratum of the quality of sound. It is the One, Eternal, and All Pervading physical substance, which is imperceptible.
According to the Samkhya school of Hindu philosophy, Akasha is one of the five Mahābhūtas (grand physical elements) having the specific property of sound.
Also mean Free space, void, substratum of the property of sound, also referred to as ether in other sciences.