Definition of domain noun from the Oxford Advanced Learner's Dictionary

      

    domain

     noun
    noun
    BrE BrE//dəˈmeɪn//
     
    , BrE//dəʊˈmeɪn//
     
    ; NAmE NAmE//doʊˈmeɪn//
     
    Mathematical terminology, Websites
     
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  1. 1an area of knowledge or activity; especially one that somebody is responsible for Financial matters are her domain. Physics used to be very much a male domain. see also public domain
  2. 2lands owned or ruled by a particular person, government, etc., especially in the past The Spice Islands were within the Spanish domains.
  3. 3(computing) a set of websites on the Internet which end with the same group of letters, for example .com, .org top-level domains Wordfinderbookmark, cookie, domain, home page, hyperlink, landing page, online, social media, URL, website See related entries: Websites
  4. 4 (mathematics) the range of possible values of a particular variable See related entries: Mathematical terminology
  5. Word Origin late Middle English (denoting heritable or landed property): from French domaine, alteration (by association with Latin dominus ‘lord’) of Old French demeine ‘belonging to a lord’, from Latin dominicus, from dominus ‘lord, master’.Extra examples This information is all in the public domain. things that happen outside the domain of the home Sensitive information should not be released into the public domain.
See the Oxford Advanced American Dictionary entry: domain