Lounging on the sofa; lounged around in pajamas.
Lounged in Venice till June.
Lounged the day away.
They lounge around on street corners, wasting their lives.
To lounge the summer away.
A comfortable room in an airport where first class passengers go to wait for their flights is an example of the First Class lounge.
A room off the lobby in a hotel where people can go and relax and listen to music and drink a drink is an example of a lounge.
When you lay stretched out on the couch and relax, this is an example of a time when you lounge on the couch.