a platform that is built on the upstairs outside wall of a building, with a wall or rail around it. You can get out onto a balcony from an upstairs room. 阳台 
We had drinks on the hotel balcony. 我们在旅馆的阳台上喝了几杯。
an area of seats upstairs in a theatre （剧院的）楼厅，楼座
Word Originearly 17th cent.: from Italian balcone, probably ultimately of Germanic origin.