Noun
A domain or sphere that is part of a larger domain or sphere.
(computing, Internet) A domain name that has been prefaced with additional parts separated with periods.
(computing, Internet) An additional part prefaced to a domain name.
In en.wiktionary.org, en is a subdomain.
As of June 2012, the INT domain consists of 166 subdomain delegations. citation These organizations are generally international organizations established by treaty. Source: Internet
For example: the label example specifies a subdomain of the com domain, and www is a subdomain of example.com. This tree of subdivisions may have up to 127 levels. Source: Internet
A popup window will open and ask you to enter your Zendesk subdomain. Source: Internet
A Records are the most basic type of DNS record and are used to point a domain or subdomain to an IP address. Source: Internet
Created a subdomain entry in my DNS to point le. Source: Internet
Earlier this week the hacker group D33D (or D33Ds) Company reportedly used a union-based SQL injection to penetrate the Yahoo subdomain and steal the plain-text passwords, some of which were alarmingly simple codes. Source: Internet