Meaning of DOMAIN in English

[do.main] n [ME domayne, fr. MF domaine, demaine, fr. L dominium, fr. dominus] (15c) 1 a: complete and absolute ownership of land--compare eminent domain b: land so owned

2: a territory over which dominion is exercised

3: a region distinctively marked by some physical feature "the ~ of rushing streams, tall trees, and lakes"

4: a sphere of knowledge, influence, or activity "the ~ of art"

5: the set of elements to which a mathematical or logical variable is limited; specif: the set on which a function is defined

6: any of the small randomly oriented regions of uniform magnetization in a ferromagnetic substance 7: integral domain

Merriam-Webster English vocab.      Английский словарь Merriam Webster.