What is the meaning of the furniture term Plywood?

Plywood is a type of engineered wood made from thin sheets (or plies) of wood veneer that are glued together with adjacent plies typically having their wood grain rotated 90 degrees to each other. This cross-graining technique gives the plywood its structural strength and stability. Plywood is commonly used in furniture-making as it is durable, strong, and cost-effective. It is often used as a core material for various furniture components. Several thicknesses of plies of wood glued together so that the grain of any one ply is at right angles to the grain of the adjacent ply.