“To watch the sun sink behind a flower clad hill. To wander on in a huge forest without thought of return. To stand upon the shore and gaze after a boat that disappears behind distant islands. To contemplate the flight of wild geese seen and lost among the clouds…” - Zeami Motokiyo
A lingering suggestiveness, memory, aftertaste or implication. The beauty that we can feel. Not in the literal sense of the word. It is not to enjoy the superficial beauty of something in front of us, but something much more impressive, its latent beauty.
For example, we think a flower is beautiful when we see it. This beauty is superficial beauty. The flower has a past of withstanding wind, rain, and snow until now, and will someday wither, however beautiful it is now.