In simpler terms:

* It's the movement of water (or another solvent) through a membrane.

* This movement happens from an area with more water to an area with less water.

* The membrane must be selectively permeable, meaning it allows some things through, but not others.

Key points about osmosis:

* It's a passive process, meaning it doesn't require energy.

* It's driven by the difference in water potential between the two regions.

* It's important for many biological processes, like maintaining cell volume and transporting nutrients.

Examples of osmosis:

* Water moving from the soil into plant roots.

* Water moving from the bloodstream into cells.

* Water moving from a hypotonic solution into a hypertonic solution.