Absorption and Conduction of Water and Minerals - Turgidity and Flaccidity (Plasmolysis)

A cell is said to be turgid when it is fully distended by the maximum intake of water and can no longer accommodate more water.

Turgidity is the condition in which a cell becomes fully swollen with water, exerting pressure on the cell wall.

or

Turgidity is the state of a cell in which the cell wall is rigid and stretched by an increase in the volume of vacuoles due to the absorption of water. The cell is then said to be turgid. 

The pressure of the cell contents on the cell wall is called turgor pressure.

The pressure exerted by the cell wall on the cell content is called wall pressure.

Plasmolysis is the process in which the cytoplasm shrinks and the plasma membrane pulls away from the cell wall due to the loss of water when a plant cell is placed in a concentrated solution.

or

Plasmolysis is the contraction of cytoplasm from the cell wall caused due to the withdrawal of water when placed in a strong (hypertonic) solution. 

Flaccidity is the condition of a cell when it becomes limp due to plasmolysis, and the plasma membrane is no longer pressed tightly against the cell wall. It is the reverse of turgidity.

or

Flaccidity is the condition in which the cell content is shrunken and the cell is no more "tight'. The cell is then said to be flaccid.