The image of a red circle sectioned in half by a diagonal line represents interdiction to enter. The symbol is utilized in buildings and for particular spaces where people are restricted from entering or doing something prohibited. Prohibited emoji, also commonly known as no symbol, can mean the following: "You are not allowed to enter the premises."
The no symbol emoji first appeared in 2010 and was immediately called the "No entry" sign, no sign, no symbol, circle-backslash symbol, interdictory circle, nay, or universal no. It is a red circle with a red diagonal line, enclosing a pictogram to prevent someone from something that is not permitted.
It is relatively easy to get no symbol or no emoji either on your computer or any mobile device even without any special emoji keyboard installed. The users need to select the preferred sign, then copy, and finally paste the symbol wherever they with the character to appear (text, document, message box, etc.). You can copy the sign: ? . Please select the name as a regular text and then copy it to your clipboard. It would be best to go to another website or blog post or application to paste no emoji using your context menu or even a keyboard. You may use Ctrl/Cmd+C keys to copy the sign, and Ctrl/Cmd+V to paste it.
Even if the no symbol emoji - ? - or icon looks like a question mark or black square, in most cases, it will be converted and “translated” into an appropriate image by the website or an application where you paste it.
While the "prohibition sign" or "no sign" has been so widely used in promotions or advertising that now a lot of variations of the symbol design (like, flipped left to right or even varied in hue). The public highly recognizes them; local and international standards still monitor it. The standardized definition of the "no symbol" comes right from the International Organization for Standardization.
In 2002, "ISO 3864-1" was first published. The introduction included language on the need for using as few words as possible to send the information. Hence, ISO 3864-1 sets the rules for the shape and color of safety signage. Besides, it regulates the incorporation of text according to signs size and viewing distance. The range of form and color for the no sign is defined in this standard for the "no symbol" as "a prohibition surround shape over the top of a black graphical symbol."
Since the standard of this, no symbol is not published fully freely, and many examples seen in public differ from the norm. Indeed, several public signs and symbols using it have not been based on the character's official standard, however, instead of on interpretations of signs or inexact copies of characters seen by each graphic artist. That has led to vast variations in sign dimensions and color. The most common variations that are seen appear to be brighter reds than the standard version. The sign is also seen with a far thinner width for the diagonal line and the right dimensions with the same width for slash as the red circle. For instance, compare the image "No smoking" (see above) with the second image "Prohibition Sign."
The Unicode code point for the no sign, no symbol, or prohibition sign is - U+20E0 ⃠ , which combines an enclosing circle with a backslash in it ⃠. The Unicode of no logo is a united character, which means that no symbol can appear on top of the character once before it. Thus, for instance, putting W ⃠ will immediately display the letter "W" right inside the prohibition sign: W ⃠ (if and only if your system supports it). Also, there are two prohibition sign symbols and emojis, if you use U+26D4 ⛔ No entry sign and U+1F6AB ? NO Entry sign, which does not unite with anything.
| Symbol | Title / Description | Unicode | Code / HTML Code |
|---|---|---|---|
| ⛔ | No entry | &U+26D4 | ⛔ |
