osmosis Definition

movement of a solvent (such as water) through a semipermeable membrane (as of a living cell) into a solution of higher solute concentration that tends to equalize the concentrations of solute on the two sides of the membrane

a process of absorption or diffusion suggestive of the flow of osmotic action; especially : a usually effortless often unconscious assimilation

the movement of fresh water through a semipermeable membrane when pressure is applied to a solution (such as seawater) on one side of it