A red circle with a diagonal line through the middle, from top-left to bottom right, used to indicate that something is not permitted
Commonly shown in conjunction with other symbols to indicate No Smoking, No Bikes, or similar.
Prohibited was approved as part of Unicode 6.0 in 2010 under the name “No Entry Sign” and added to Emoji 1.0 in 2015.
U+1F6AB
? No entry sign