Rare collective use, usually with the definite article: “the pure”.
pursEmploi collectif au pluriel. Legends say the pure will inherit the kingdom of heaven.
Les légendes disent que les purs hériteront du royaume des cieux.
Informal (chiefly Scottish, Irish, and Northern English); used as an intensifier meaning ‘completely’ or ‘absolutely’.
That gig was pure brilliant from start to finish.
Ce concert était complètement génial du début à la fin.