What is the meaning of Piping?

present participle and gerund of pipe

The process of an animal just beginning to break out of its egg; precedes hatching.

The sound of musical pipes.

An act of making music or noise with pipes.

A system of pipes that compose a structure; pipework.

An ornamentation on the edges of a garment; a small cord covered with cloth.

Icing extruded from a piping bag.

A piece cut off to be set or planted; a cutting.

propagation by cuttings

High-pitched.

Source: wiktionary.org