Demesne. “Demesne land” is that near the demesne or dwelling (domus) of the lord, and which he kept for his own use. Manor land was all that remained (manco), which was let to tenants for money or service.
In some manors there was common land also, i.e. land belonging in common to two or more persons, to the whole village, or to certain natives of the village.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894