Leaning refers to the act of tilting or resting against a surface for support. It can occur in various contexts, such as when a person leans against a wall or when an object leans on another object. This action can provide stability and balance, making it easier to perform tasks or rest. In architecture, leaning can describe structures that are not perfectly vertical, such as the famous Leaning Tower of Pisa. This tower has a noticeable tilt due to unstable foundation soil. Leaning in this context highlights the importance of proper engineering and construction techniques to ensure safety and longevity.