This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 奣 is uncertain. It visually combines 天 (heaven) and 明 (bright), but its original meaning and formation are unclear.
With no clear meaning, picture 天 (heaven) shining brightly above 明 (bright), suggesting something vast and luminous, but its true sense remains a mystery.
For オウ, imagine an owl (オウ) perched between heaven and brightness, hooting softly as it guards the unknown meaning of 奣.