What is described as a pleasing or meaning ful arrangements of sounds?

A pleasing or meaningful arrangement of sounds is most commonly described as music.

Here's why:

* Pleasing: Music often employs elements like melody, harmony, and rhythm to create enjoyable and satisfying auditory experiences.

* Meaningful: Music can convey emotions, tell stories, evoke memories, and even have cultural significance. It's often used for expression, communication, and ritual.

While other arrangements of sounds might be considered pleasant or meaningful (like nature sounds or spoken language), the term "music" is specifically used to describe the intentional and structured organization of sound for aesthetic and expressive purposes.