Attributive use of the noun to modify another noun.
Definitionen
Attributive, used before another noun, denoting or characterized by perfection or flawlessness. The team devised a perfection strategy that left no room for error.
Used colloquially as an exclamation to express that something is perfect.
Definitionen
(colloquial) Used to express satisfaction that something is perfect or ideally suited. "A warm bath after a long day—perfection!"