The term "modular" refers to a design approach that breaks down a system into smaller, self-contained units or modules. Each module can function independently but can also work together with other modules to create a larger, more complex system. This concept is commonly used in various fields, including architecture, software development, and manufacturing. In architecture, for example, a modular home consists of pre-fabricated sections that are assembled on-site, allowing for quicker construction and flexibility in design. In software, modular programming enables developers to create reusable code components, making it easier to maintain and update applications.