Modular describes something built from separate parts, or modules, that can be combined, replaced, or rearranged. This design makes systems easier to build, repair, and customize.
From “module,” which comes from Latin “modulus,” meaning “small measure or standard.” The idea of modular design is based on using standard-sized parts that fit together.
Modular thinking is like using LEGO bricks instead of carving a statue from one solid block. Phones, furniture, even space stations use this idea: swap a part, not the whole thing.
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