1. A lord’s chief manor place, with that part of the lands belonging thereto which has not been granted out in tenancy; a house, and the land adjoining, kept for the proprietor’s own use.
2. A region or area; a domain.
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As for you, Chettam, you are spending a fortune on those oak fences round your demesne.
George Eliot. Middlemarch
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For this prince lives chiefly upon his own demesnes, seldom, except upon great occasions, raising any subsidies upon his subjects, who are bound to attend him in his wars at their own expense.
Jonathan Swift. Gulliver's Travels Into Several Remote Regions of the World (1726)
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And over this great demesne Buck ruled. Here he was born, and here he had lived the four years of his life. It was true, there were other dogs, There could not but be other dogs on so vast a place, but they did not count.
Jack London. The Call of the Wild (1903)
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Not to inherit by right of primogeniture, gavelkind or borough English, or possess in perpetuity an extensive demesne of a sufficient number of acres, roods and perches, statute land measure (valuation 42 pounds), of grazing turbary surrounding a baronial hall with gatelodge and carriage drive nor,