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Definition of subdomain

subdomain

/ˈsʌbdoʊˌmeɪn/
sub · do · main
Plural:subdomains
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subdomain Lexical Profile

subdomain Game Scores & Validity

• noun

1

A domain that is part of a larger domain in the Domain Name System (DNS) hierarchy, typically appearing as a prefix before the main domain name in a web address.

Example

"The company created a separate subdomain to host its customer support portal and documentation."

2

A smaller, specialized subdivision of a broader field of knowledge, activity, or mathematical set.

Example

"Natural language processing is a rapidly growing subdomain of artificial intelligence."

Synonyms
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Antonyms
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• Nearby Words

subdistrict
subdivide
subdivision
subdomain
subdue
subdued
subeditor

Cite this Entry

Wordmom. (2026). Definition of Subdomain. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/subdomain
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