Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: French
Origin: domaine, from Latin dominus 'lord'

domain

noun
     
Related topics: Maths
do‧main [countable] formal
1 an area of activity, interest, or knowledge, especially one that a particular person, organization etc deals with
outside/within the domain of something/somebody
This problem is outside the domain of medical science.
Looking after the house was viewed as a woman's domain.
public domain
2 an area of land owned and controlled by one person or government, especially in the past:
the extent of the royal domain
3HM technical the set of possible quantities by which something can vary in mathematics
4 a domain name

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