What is the difference between Drying and Dehydration?

Generally, we use both the terms interchangeably.

Sometimes, it is mentioned that the process of removal of moisture in controlled manner is dehydration and if uncontrolled then it is drying.

or

Removal of moisture by natural process like with sun rays then it is drying and if done with machines then dehydration..    and many more...


But, as per the words tell us,

We can say that

Drying is the process in which we make the product dry irrespective of its solvent like if we are drying any fruit then it is removal of moisture (water which is solvent here) and if we are removing other solvent like alcohol from solution then also we can call this process as drying.

And the word Dehydration contains hydra means related to water. So, Dehydration means in particular removal of water or moisture .

Again, it is not the full proof difference and don't have any reference, so we can use these words interchangeably !!!