no obj., with adverbial of place
- lie, sit, or stand in relaxed or lazy way轻松（或懒洋洋）地躺（或坐、站）着：
several students were lounging about reading papers.
好几个学生懒洋洋地散坐在各处看报。
1
- a public room in a hotel, theatre, or club in which to sit and relax（旅馆、剧场或俱乐部的）休息室。
1.1
- a spacious area in an airport with seats for waiting passengers（机场）候机大厅：
the departure lounge.
候机室。
1.2
- Brit. a sitting room in a house〈英〉起居室。
2
- in sing. Brit. an act or spell of lounging〈英〉放松（或懒洋洋）的躺（或坐、站）; 放松（或懒洋洋）的躺（或坐、站）着的一段时间。
词源
early 16th cent. （in the sense 'move indolently'）： perhaps symbolic of slow movement. Sense 1 of the noun dates from the late 19th cent.