Khalsa
Khalsa: Literally "belonging only to the divine;"
the term is derived from the land specially reserved for the family of Mughal emprors of India.it was the most fertile land and looked after personally by the empror.it appears therefore to mean"close or beloved to God".Khalsa mero roop hai khas,khalsa maen haon kroh niwas.the idea of purity and pollution is foreign to sikhism and does not apply to an army(akalpurukh ki fauj.)
The Blue Print of Khalsa was envisioned by Nanak as 'IDOL of TRUTH' ,and formally documented in the begning of holy Shiri Guru Granth Sahib in the Theology of Sikhism encapsulated in Mool Mantar.
About 200 Years later The collective body of all initiated Sikhs, who drink the amrit instituted by Guru Gobind Singh, and agree to live by the highest ideals of Sikh principles. Committed to one's own purity of consciousness and actions.