But the same amount of solution, now the concentration on the outside will decrease because now we have the same amount, but a larger volume, a larger amount of water. And that means eventually our concentrations will equal out. So now let's define osmosis. Osmosis is the movement of solvent. In our case, water from an area of a lower side concentration to an area of a higher sized concentration. So in the system above, osmosis occurred from the inside the cell into the outside, because water moves from a lower concentration to a higher concentration.