Meaning of DOMAIN in English

n. 1 an area under one rule; a realm. 2 an estate or lands under one control. 3 a sphere of control or influence. 4 Math. the set of possible values of an independent variable. 5 Physics a discrete region of magnetism in ferromagnetic material. domanial adj.

[ ME f. F domaine, OF demeine DEMESNE, assoc. with L dominus lord ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.