noun
domain
doh-MAYN
noun
1
A field or area of activity, knowledge, or control.
"Marketing strategy falls squarely within her domain."
"Space exploration is no longer solely the domain of governments."
2
A territory owned or ruled by one person, group, or organization.
"The castle once stood at the heart of the duke's domain."
3
A website address (or the underlying registered name) used to identify it on the internet.
"We registered the domain last month before launching the site."
How to Use Domain
Learner’s notesIn plain EnglishAn area someone controls or specializes in — or, online, a website's registered name.
Common pairings
area of expertise
domain name
public domain
Word Forms
domains plural
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Marketing strategy falls squarely within her _____.
Etymology
From Old French demeine, "power, rule," ultimately from Latin dominium, "ownership" — related to "dominion" and "dame."