SHASTRA
Etymology
Noun
Shastra (plural Shastras)
A treatise for authoritative instruction in Hinduism, especially one explaining the Vedas.
Usage notes
Often used in combination (in the names of particular examples). (The Sanskrit term is generally used as a suffix, roughly equivalent to -logy.)
Noun
shastra (plural shastras)
Alternative form of Shastra
Source: Wiktionary
Shas"ter, Shas"tra, n. Etym: [Skr. castra an order or command, a
sacred book, fr. cas to order, instruct, govern. Cf. Sastra.]
Definition: A treatise for authoritative instruction among the Hindoos; a
book of institutes; especially, a treatise explaining the Vedas.
[Written also sastra.]
Source: Webster’s Unabridged Dictionary 1913 Edition