Definition of 「〇」:
1. A numerical blank space used within numbers, often used to represent page numbers or years.
(数的空位，用于数字中，多用于表示页码或年代。)
2. Numerical blank space used within numbers, commonly used to indicate page numbers or years: 1～8位，一九九～。
(数的空位，用于数字中，多用于表示页码或年代：一～八位，一九九～。)
3. Same as "星" (star). A character created by Empress Wu Zetian of the Tang Dynasty.
(同“星”。唐武则天所造字。)
4. Same as "星" (star). A character created by Empress Wu Zetian of the Tang Dynasty. “曐” from "集韵·青韵": or abbreviated as "星", created by Empress Wu.
(同“星”。唐武则天所造字。《集韵·青韵》：“曐”，或省作“星”，唐武后作“〇"。)