1. A status in which the total charge of all the positive ions of a substance almost exactly equals the total charge of all the negative ions.
2. A condition in which the total charge of all the positive ions of a substance almost exactly equals the total charge of all the negative ions.
3. A reference to the condition of a medium which is electroneutral.

In other words, an electrolytic solution in which the negatively and positively charged ions are distributed so that the solution as a whole is neutral.