This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
禯 combines 示 (altar, religious ceremony) with 農, which likely contributes the sound. The exact historical development is uncertain.
The left side 示 suggests a religious or ceremonial context, and the right side 農 (farming) may hint at a harvest festival. Picture an altar used for a farming ritual.
For チョウ, imagine a long-serving chief named Chou performing a ceremony at the altar: Chou -> チョウ.