This is the 11746th most frequent Swedish word.
piano
A musical instrument with keys producing sound by hammers striking strings.
Here 'piano' refers to the musical instrument being played.
Jag spelar piano varje kväll.
I play the piano every evening.
In this sentence, 'piano' denotes the physical object, the instrument.
Det finns ett gammalt piano i hörnet av rummet.
There is an old piano in the corner of the room.
In this context, 'piano' represents the category or concept of the instrument.