Definitions of domain on the Web:

• sphere: a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
• territory over which rule or control is exercised; "his domain extended into Europe"; "he made it the law of the land"
• (mathematics) the set of values of the independent variable for which a function is defined
• world: people in general; especially a distinctive group of people with some shared interest; "the Western world"
• knowledge domain: the content of a particular field of knowledge
  wordnetweb.princeton.edu/perl/webwn
• The Domain is a high-density business, retail, and residential center operated by Simon Property Group and Endeavor Real Estate Group, and is ...
  en.wikipedia.org/wiki/The_Domain_(Austin,_Texas)
• Domain is the debut album of the British heavy metal band Above All. It was described as the closest thing to British hardcore at the time in 1996 on MTV's Headbangers Ball. The album's content is highly politically motivated.
  en.wikipedia.org/wiki/Domain_(album)
• Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets and/or exhibit strong interactions with magnets; it is responsible for most phenomena of magnetism encountered in everyday life (for example, refrigerator magnets). ...
  en.wikipedia.org/wiki/Domain_(electricity_and_magnetism)
• A domain is a field of study that defines a set of common requirements, terminology, and functionality for any software program constructed to solve a problem in the area of computer programming, known as domain engineering.
  en.wikipedia.org/wiki/Domain_(software_engineering)
• In complex analysis a domain usually means an open connected subset of the complex plane or of .
  en.wikipedia.org/wiki/Domain_(complex_analysis)
• In biological taxonomy, a domain (also superregnum, superkingdom, or empire) is the highest taxonomic rank of organisms, higher than a kingdom. According to the three-domain system of Carl Woese, introduced in 1990, the Tree of Life consists of three domains: Archaea, Bacteria and Eukarya. ...
  en.wikipedia.org/wiki/Domain_(biology)
• The Domain is a large open space in Sydney, New South Wales, Australia. It is located on the eastern edge of the Sydney central business district, near Woolloomooloo. ...
  en.wikipedia.org/wiki/The_Domain
• Domain is a German power metal band.
  en.wikipedia.org/wiki/Domain_(band)
• A protein domain is a part of protein sequence and structure that can evolve, function, and exist independently of the rest of the protein chain. Each domain forms a compact three-dimensional structure and often can be independently stable and folded. ...
  en.wikipedia.org/wiki/Domain_(protein)
• In mathematics, especially in the area of abstract algebra known as ring theory, a domain is a ring with 0 ≠ 1 such that ab = 0 implies that ...
  en.wikipedia.org/wiki/Domain_(ring_theory)