country house

Short definition from Wiktionary

Noun

1. 1
   A house serving as a weekend and holiday residence, used as a retreat from city life; traditionally and archetypically in the country, and especially of wealthy owners.
2. 2
   Such a house, even as a primary residence and even in an area that is no longer rural, but with an aesthetic in keeping with that traditional distinction of country ways.
3. 3
   Used other than figuratively or idiomatically: see country, house: a house in the country: one not in town.
4. 4
   Alternative form of country house.