**Domain** may refer to:

## Contents

- 1 Mathematics
- 2 Science
- 3 Information technology
- 4 Places
- 4.1 Australian Public Domains
- 4.2 New Zealand Public Domains

- 5 Film
- 6 Other uses

## Mathematics

- Domain of a function, the set of input values for which the (total) function is defined
- Domain of definition of a partial function
- Natural domain of a partial function
- Domain of holomorphy of a function

- Domain (mathematical analysis), an open connected set
- Domain of discourse, the set of entities over which logic variables may range
- Domain of an algebraic structure, the set on which the algebraic structure is defined
- Domain theory, the study of certain subsets of continuous lattices that provided the first denotational semantics of the lambda calculus
- Domain (ring theory), a nontrivial ring without left or right zero divisors
- Integral domain, a non-trivial commutative ring without zero divisors
- Atomic domain, an integral domain in which every non-zero non-unit is a finite product of irreducible elements
- Bézout domain, an integral domain in which the sum of two principal ideals is again a principal ideal
- Euclidean domain, an integral domain which allows a suitable generalization of the Euclidean algorithm
- Dedekind domain, an integral domain in which every nonzero proper ideal factors into a product of prime ideals
- GCD domain, an integral domain in which every two non-zero elements have a greatest common divisor
- Principal ideal domain, an integral domain in which every ideal is principal
- Unique factorization domain, an integral domain in which every non-zero element can be written as a product of irreducible elements in essentially a unique way

- Integral domain, a non-trivial commutative ring without zero divisors
- Frequency domain, the analysis of mathematical functions with respect to frequency, rather than time
- Fundamental domain, subset of a space that contains exactly one point from each orbit of the action of a symmetry group
- Time domain, the analysis of mathematical functions with respect to time

## Science

- Domain (biology), a taxonomic subdivision larger than a kingdom
- High-field domain (physics) in semiconductors, also called Böer domain
- Protein domain (biology), a part of a protein that can exist independently of the rest of the protein chain
- Magnetic domain (physics), a region within a magnetic material which has uniform magnetization
- Social domain, a concept in sociology
- Domain of discourse, the collection of entities of interest in logical analysis

## Information technology

- Administrative domain
- Broadcast domain, in computer networking, a group of special-purpose addresses to receive network announcements
- Collision domain
- Domain (software engineering), a field of study that defines a set of common requirements, terminology, and functionality for any software program constructed to solve a problem in a given field
- Application domain, a mechanism used within a Common Language Infrastructure to isolate executed software applications from one another
- Programming domain, a set of programming languages or programming environments that were engineered specifically for a particular domain (software engineering)

- Network domain, a named grouping of hosts and servers with managed login, access to resources, and permissions.
- Domain name, a label that identifies a realm of administrative autonomy, authority, or control within the Internet

## Places

- Domain, Manitoba, a hamlet in Manitoba, Canada
- The Domain (Austin), a shopping mall in Austin, Texas, USA
- Domain (Hong Kong), a shopping mall in Yau Tong, Kowloon,... ...read more