Final answer:
A nocturne is most commonly associated with and played on the piano. It is a musical composition that embodies a romantic and dreamy atmosphere, inspired by the night.
Step-by-step explanation:
A nocturne is a musical piece that is inspired by, or evocative of, the night. It is particularly associated with a romantic and dreamy atmosphere. The term 'nocturne' was first applied to pieces in the 18th century, but it became significantly prominent in the 19th century, especially through the works of Frédéric Chopin. While nocturnes can be written for various musical ensembles or instruments, they are most commonly associated with, and frequently played on, the C. Piano.