(a) Adjective: Pure, pious, clean, without impurity or without blemish.
(b) Noun: A Sikh sect initiated at the time of Guru Gobind Singh Ji, the tenth Guru of the Sikhs.Brief History of "Nirmalas"
Guru Ji sent five of his chosen Sikhs, e.g. Ram Singh, Karam Singh, Ganda Singh, Vir Singh and Sobha Singh to Benaras for deeper study of Sanskrit holy books with a view to consolidat the philosophical basis of Sikhism. They returned to Anandpur Sahib after completing the allotted task after 1699, the date of the initiation of theKhalsa.
Guru Ji assigned them a task of translating Sanskrit holy books into Gurmukhi and of preaching Gurbani. These six and their followrs came to be known as "Nirmalas". They wore salmon colored clothes. They established deras to preach Gurmat in accordance with the Sikh traditions. Some Nirmalas Saints did not settle at one place and remained moving from place to place preaching Gurmat.
1. Giani Gian Singn. Panth Parkash.
2. Bhai Kahan Singh Nabha. Gurshabad Ratnakar Mahan Kosh.
3. Rosemary Goring. (ed.) Dictionary of Beliefs and Religions.