noun
luxury apartment; apartment worth 100 million yen or more
Jocular term coined from マンション (mansion/apartment) by replacing 万 (マン, 10,000) with 億 (おく, 100 million), implying an extremely expensive apartment. Often used humorously or in real estate contexts.
See also: マンション
彼は都心の億ションに住んでいるらしい。
I hear he lives in a luxury apartment in the city center.
このエリアには億ションが立
This area is lined with apartments worth over a hundred million yen.