1. Seal: This is the most common meaning. Dojang refers to a small, usually rectangular, stamp made of wood, stone, or metal. It often features a carved design, such as a person's name or an organization's logo. These seals are used for authentication and official purposes, similar to a signature.
2. Training Hall: This meaning is specifically used in the context of martial arts. Dojang (sometimes spelled "dojo") refers to a training hall or school where martial arts like Taekwondo, Judo, or Karate are practiced.
To understand which meaning is intended, you need to consider the context. If you're talking about a martial arts practice, "dojang" refers to the training hall. Otherwise, it most likely means a seal.