Juice vs Undefined - What's the difference?

As an acronym juice

is (space|esa).

lacking a definition or value.

(wikipedia juice) (en-noun)

(uncountable) A liquid from a plant, especially fruit.

Squeeze the orange and some juice will come out .

(countable) A beverage made of juice.

I’d like two orange juices please .

(uncountable) Any liquid resembling juice.

(Scotland) A soft drink.

(uncountable, slang) Electricity.

(uncountable, slang) Liquor.

(uncountable, slang) Political power.

(uncountable, slang) Petrol; gasoline.

(uncountable, slang) The amount charged by a bookmaker for betting services.

(uncountable, slang) Steroids.

(uncountable, slang) Semen.

(uncountable, slang) The vaginal lubrication that a woman naturally produces when sexually aroused.

(uncountable, slang) Musical agreement between instrumentalists.

* (charge by bookmaker) cut, take, vig, vigorish

* elbow juice

To remove the juice from something.

To energize or stimulate something.

* dejuice * juice up * unjuice

(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