domain
//dəˈmeɪn//
Noun
domainSingular
domainsPlural
1
An area of territory owned or controlled by a ruler or government
The kingdom expanded its domain through conquest and diplomacy.
2
A specified sphere of activity or knowledge
Mathematics is not my domain.
3
A distinct subset of the Internet with addresses sharing a common suffix or under the control of a particular organization or individual
Our company registered a new domain for our website.
4
A discrete region of magnetism in ferromagnetic material
The magnetic domains in iron align when exposed to an external magnetic field.
5
The set of possible values of the independent variable or variables of a function
The domain of the function f(x) = 1/x is all real numbers except zero.