Master the word " DOMAIN " in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource. On the Internet, a domain is a space with a specific address, but a domain can also have a physical address, like a home. It can be a specialty, too, as in, "The main domain of the art school was sculpture," or "She was so good at math that algebra became her domain ." (on the internet) one or more computers or computer networks under the same administrative control, identified by a domain name or any of its discrete parts. top-level domain . Include Domain ID protection: When registering a domain name, you must include information like name, phone number, physical address, and email address, which will become public once your domain name has been registered. To protect yourself, you can purchase domain privacy, which will shield your information from spammers or identity thieves.