Definition - What does Shruti mean?
Shruti is a Sanskrit word meaning "that which is heard" and is the collection of most authoritative religious works in Hinduism. The shrutis are different than other collections of Hindu philosophical texts in that they span a great amount of time and cover much of Hindu history. The collection contains the four Vedas: Samhitas, Brahmanas, Aranyakas, and Upanishads.
Yogis with a spiritual practice may want to incorporate a meditation of the shrutis into their expression of yoga.
Yogapedia explains Shruti
Although most Hindu scholars do not believe the texts are of divine origin, they are referred to as being authorless and not attributed to any specific creators. Many uphold the belief that the shruti are manmade, flawed works not of divine origin; however, all orthodox groups of Hinduism accept them as an authoritative cannon of religious and philosophical literature and are considered by some as the product of divine revelation.
The shrutis have been used as a guide for Hindu law and culture, and are thought to have been divine truths recorded by rishis. Many choose to study and meditate on the content of the shrutis and most mantras are drawn from them for use in both personal and public worship.