Merriam-Webster's Collegiate® Dictionary, 11th Edition
LOUNGE
I. verb (lounged; lounging)
Etymology: origin unknown
Date: 1508
intransitive verb to act or move idly or lazily ; loaf , see: idle transitive verb to pass (time) idly,
II. noun
Date: 1775
a place for lounging: as, a room in a private home or public building for leisure activities ; living room , a room in a usually public building or vehicle often combining lounging, smoking, and toilet facilities, a long couch