piping means: A trim, or edge known as piping is created by sewn a strip of folded fabric (typically bias binding) into a tube. The tube then attaches to the edge of a piece. You can add cord for extra strength. A lot of garments use piping to reinforce or define the design lines. (in Fashion Dictionary)

What else does piping mean?

A network of pipes that is similar to those in plumbing. (in Merlin Dictionary)

Playing on a pipe is an act. (in Merlin Dictionary)

A pipe produces music when it is played. (in Merlin Dictionary)

It is a high-pitched, shrill sound. (in Merlin Dictionary)

A tube made of narrow fabric that sometimes contains a cord and is used to trim seams or edges. (in Merlin Dictionary)

An icing ribbon that is tubular on top of a cake. (in Merlin Dictionary)

( It’s piping hot (Very hot. (in Merlin Dictionary)