What 軧 means
It names the raised rear rail of a large transport cart. This cart rail helped keep a load from slipping out behind.
The old Mao commentary—a set of notes on the Book of Songs, an ancient Chinese poetry collection—uses 軧 in a note about a wheel hub, the center of a wheel, wrapped in red leather. The Eastern Han dictionary Shuowen Jiezi (88–144 CE) uses the close form 軝 for that wheel-hub note and defines 軧 separately as the rear of a large cart. The surrounding passage tells you which sense is meant.
Is 軧 an emoji?
No; 軧 is a text character drawn by the font. If you're asking why 軧 shows as a box or blank, the font lacks this character; the fallback display does not change the intended character. A CJK font that includes 軧 can display its form.
A classical, technical cart term; outside a historical or character-study context, add a short gloss.
An old passage may use 軧 for a cart's rear or for the red-leather wheel-hub note; use context to tell them apart.
Don't confuse it with
1Questions people ask
1Why does 軧 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 軧
軧\8EE7Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.