What ⦄ means
⦄ is the right white curly bracket. Unicode classifies it as a closing bracket and files it in the Miscellaneous Mathematical Symbols-B block; this site shelves it under Maths.
Its appearance depends on the font and text styling.
How it is encoded
⦄ is a single code point, U+2984. In HTML that is ⦄, and in CSS \2984.
Don't confuse it with
1Questions people ask
1Why does ⦄ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⦄
⦄\2984Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

