1.  piping(n = noun.artifact) - a thin strip of covered cord used to edge hems;
is a kind of cord
Derived form verb pipe₄

2.  piping(n = noun.artifact) pipage, pipe - a long tube made of metal or plastic that is used to carry water or oil or gas etc.;
is a kind of tube, tubing
has parts: spout
has particulars: chimneypot, discharge pipe, drain, drainpipe, waste pipe, drilling pipe, elbow, exhaust pipe, fuel line, gas line, petrol line, main, manifold, line, pipeline, riser, riser main, riser pipe, riser pipeline, sparge pipe, standpipe, steam line, steam pipe, tailpipe
Derived form verb pipe₂

3.  piping(n = noun.act) - playing a pipe or the bagpipes;
is a kind of playing
Derived form verb pipe₃

   piping(r = adv.all) steaming - (used of heat) extremely; "the casserole was piping hot"

1.  Playing on a musical pipe. Swift. [1913 Webster]

2.  Peaceful; favorable to, or characterized by, the music of the pipe rather than of the drum and fife. Shak. [1913 Webster]

3.  Emitting a high, shrill sound. [1913 Webster]

4.  Simmering; boiling; sizzling; hissing; -- from the sound of boiling fluids. [1913 Webster]

1.  A small cord covered with cloth, -- used as trimming for women's dresses. [1913 Webster]

2.  Pipes, collectively; as, the piping of a house. [1913 Webster]

3.  The act of playing on a pipe; the shrill noted of birds, etc. [1913 Webster]

4.  A piece cut off to be set or planted; a cutting; also, propagation by cuttings. [1913 Webster]

piping, n. & adj.
--n.
1 the act or an instance of piping, esp. whistling or singing.
2 a thin pipelike fold used to edge hems or frills on clothing, seams on upholstery, etc.
3 ornamental lines of icing, cream, potato, etc. on a cake or other dish.
4 lengths of pipe, or a system of pipes, esp. in domestic use.
--adj. (of a noise) high; whistling.

Idiom:
piping hot very or suitably hot (esp. as required of food, water, etc.).

piping crow, piping crow-shrike, piping guan, piping plover