noun
couch
KOWCH/kaʊtʃ/
A long, padded seat for several people.
The couch has a long padded seat and two armrests.

Etymology
The underlying idea of laying or placing became associated with lying down and with a bed. English couch first meant a bed, then a long seat on which someone could rest at full length.
In context
You heard from Patrick when he's leaving, Dawson is sitting on the couch eating chicken nuggets and green beans out of a bowl.