Prohibition Symbol - Universal “No” Sign for Safety and Compliance #189778 (License: Personal Use)

This black-and-white prohibition symbol consists of a solid circle with a diagonal line crossing from upper left to lower right, universally understood to mean “not allowed” or “forbidden.” It is standardized in ISO 7010 and widely used in traffic, workplace safety, and digital interfaces to convey restrictions without language barriers. Its high contrast and minimalist design ensure immediate recognition across cultures and contexts.

Used on regulatory signage (e.g., no smoking, no entry), software UIs (e.g., disabled buttons), and instructional materials where visual cues must override text. Matches user intent for understanding warnings, compliance requirements, or interface feedback.