अनिर्धारित (en. Undefined)

What is the difference between null and undefined in JavaScript?

Detecting an undefined object property.

Why is null an object and what's the difference between null and undefined?

Such power though unrestricted and undefined should not be capriciously or arbitrarily exercised, but should be exercised in appropriate cases, ex debito justitiae to do real and substantial justice for the administration of which alone the courts exist.

The Legislature in its wisdom has left the power undefined.

The officer cannot arbit rarily act on his mere whim and ignore his promise on some undefined and undisclosed grounds of necessity or change the conditions to the prejudice of the person who had acted upon such representation and put himself in a disadvantageous position.

After all, an undefined identifier is not very useful.