Ripple vs Undefined - What's the difference?

As a noun ripple

is a moving disturbance or undulation in the surface of a liquid.

is to move like the undulating surface of a body of water; to undulate.

lacking a definition or value.

(en noun)

A moving disturbance or undulation in the surface of a liquid.

I dropped a small stone into the pond and watched the ripples .

A sound similar to that of undulating water.

A style of ice cream in which flavors have been coarsely blended together.

I enjoy fudge ripple''' ice cream, but I especially like to dig through the carton to get at the '''ripple part and eat only that.

(electronics) A small oscillation of an otherwise steady signal.

An implement, with teeth like those of a comb, for removing the seeds and seed vessels from flax, broom corn, etc.

To move like the undulating surface of a body of water; to undulate.

To propagate like a moving wave.

* 2008 , Bradley Simpson, Economists with Guns , page 65:

These problems were complicated by a foreign exchange crunch which rippled through the economy in 1961-1962, [...].

To make a sound as of water running gently over a rough bottom, or the breaking of ripples on the shore.

To remove the seeds from (the stalks of flax, etc.), by means of a ripple.

(by extension) To scratch or tear.

(Holland)

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined