are a formal Internet address within a domain, such as subdomain.yourdomain.com.
A subdomain is essentially a secondary virtual server for your primary domain. It follows the pattern similar to 'subdomain.domain.com' (assuming your domain is 'domain.com'). Each subdomain is mapped to directory in the root of your primary domain's website. Subdomains are available as a paid option.
The Subdomain feature allows you to create third level domain names from your main domain name. These subdomains can host completely different content from the main domain, since the content is stored in a different folder. Example: something.yourdomain.com
Subdomain is a specific folder in your “root” directory (usually public_html) that has been assigned as a subdomain. Example: http://subdomain.domain.com.
Subdomains are basically extensions of your domain. You can set them up for others, so they don't have to purchase their own domain. An example of a subdomain URL would be http://john.domain.com
You will be able to have subdomains (ie. subdomain.yoursite.com) for your site in the number specified
A method of putting multiple domains under one “Parent” domain by separating them with a period (IE: www.arishost.com is the parent domain, and support.arishost.com is the subdomain).