What ⍻ means
It marks a receiver’s negative response in a control-code system.
NAK is short for “Negative Acknowledge,” a receiver’s negative reply to a sender. A control code is a normally invisible instruction used in data exchange; ⍻ is the printable graphic for that role, not the code itself.
ECMA-17 (1968), ANSI X3.32 (1973), and ISO 2047 (1975) standardized graphics for control codes; ISO 2047 includes ⍻. Its crossed-check shape may suggest rejection.
Don't confuse it with
1Questions people ask
1Can fonts draw ⍻ differently?
Yes. Its outline comes from the font; the character itself stays the same.
How to type ⍻
Windows (Word)
Alt+XType 237B, then Alt+X to get ⍻.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “not check mark”.
Linux
Ctrl+Shift+UType 237b, then Enter or Space.
HTML
⍻CSS
\237BCodes and encoding1 code points
HTML decimal
⍻
HTML hex
⍻
CSS content
content: "\237B";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8D%BB
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.