Standard Lemma guide

subdomain

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • UK: Recorded audio is listed in the source snapshot.
  • rhymes with -eɪn

1

noun

Meaning 1

A domain or sphere that is part of a larger domain or sphere.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A domain name that has been prefaced with additional parts separated with periods.

Definition source: English Wiktionary via Wiktextract

Usage: Internet

Examples

  • BIND 9 Administrator Reference Manual (9.3.2), Copyright © 2004, 2005 Internet Systems Consortium, Inc. ("ISC"), Copyright © 2000-2003 Internet Software Consortium, https://web.archive.org/web/20060619063455/http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch01.html Every name in the DNS tree is a domain, even if it is terminal, that is, has no subdomains. Every subdomain is a domain and every domain except the root is also a subdomain.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An additional part prefaced to a domain name.

Definition source: English Wiktionary via Wiktextract

Usage: Internet

Examples

  • In en.wiktionary.org, en is a subdomain.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From sub- + domain.

Across languages

Translations

9 source translations are retained for this English entry.

  • French: sous-domaine — domain name prefaced with additional parts separated by a period
  • Icelandic: undirlén — domain name prefaced with additional parts separated by a period
  • Italian: sottodominio — domain name prefaced with additional parts separated by a period
  • Marathi: सब्डोमेन (sabḍomen) — domain name prefaced with additional parts separated by a period
  • Polish: subdomena — domain name prefaced with additional parts separated by a period
  • Portuguese: subdomínio — domain name prefaced with additional parts separated by a period
  • Spanish: subdominio — domain name prefaced with additional parts separated by a period
  • Tagalog: subdomeyn — domain name prefaced with additional parts separated by a period
  • Vietnamese: tên miền phụ — domain name prefaced with additional parts separated by a period