Source : Webster's Revised Unabridged Dictionary (1913)

Pristine \Pris"tine\, a. [L. pristinus, akin to prior: cf. F.
   pristin. See {Prior}, a.]
   Belonging to the earliest period or state; original;
   primitive; primeval; as, the pristine state of innocence; the
   pristine manners of a people; pristine vigor.

Source : WordNet®

pristine
     adj 1: completely free from dirt or contamination; "pristine
            mountain snow"
     2: immaculately clean and unused; "handed her his pristine
        white handkerchief"