noun
secondary residence; vacation home; villa
Refers to a second home, often a detached house used for vacations or as a retreat, distinct from one's main residence.
彼は軽井沢に別邸を持っている。
He has a villa in Karuizawa.
夏休みは家族で別邸に滞在した。
We stayed at our vacation home with the family during summer break.