Original: When a plant cell is placed in a hypertonic solution, the water in the cells moves to an area higher in solute concentration and the cell shrinks, and in doing so, becomes flaccid. This means the cell has become plasmolysed â "the cell membrane has completely left the cell wall due to lack of water pressure on it; the opposite of turgid.
Simplified: Hypertonic is when the there is more salt outside the cell than in the cell.