Solution

Cells are plasmolysed (plasmolysis has occurred) when the cell contents shrink and come out from the cell wall.
If there is a higher concentration of dissolved salt outside of the cell (a hypertonic environment), then H$$_2$$O will diffuse "out" from the cell and the cell will shrink and cellular metabolism will cease. This phenomenon is called as plasmolysis and it is the reason why foods can be preserved with high concentrations of salt and sugar.