Physical Chemistry, Cell Biology. the tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane. the diffusion of fluids through membranes or porous partitions. Compare endosmosis, exosmosis.
a subtle or gradual absorption or mingling: He never studies but seems to learn by osmosis.
the passage of a solvent through a semipermeable membrane from a less concentrated to a more concentrated solution until both solutions are of the same concentration
diffusion through any membrane or porous barrier, as in dialysis
gradual or unconscious assimilation or adoption, as of ideas