Is it true that the movement of water molecules through a cell or plasma membrane is called diffusion?

The movement of water molecules through the plasma membrane is called osmosis. Osmosis is the passage of water from the region of higher concentration to the region of lower concentration through a semi-permeable membrane.

Diffusion is a process by which molecules or ions move from an area of higher concentration to an area of lower concentration. This movement occurs due to the random motion of molecules, and it continues until the concentration is the same throughout the area.