This is the 16402nd most frequent Turkish word.
yaslanmış
"Yaslanmış" means "leaned" or "reclined."
In this sentence, 'yaslanmış' describes the action of leaning, specifically indicating that the subject, 'Adam' (the man), has taken a leaning position towards the couch.
Adam bir kanepeye yaslanmıştı.
The man was leaning against a couch.
Here, 'yaslanmış' modifies the noun 'ayna' (mirror), describing its position as leaning against another object, in this case, the corner of the room.
Salonun köşesine yaslanmış bir ayna duruyordu.
There was a mirror leaned against the corner of the living room.
In this context, 'yaslanmış' describes the state of 'masa' (table) as being positioned to rest against a wall.