Architectural means relating to the design and construction of buildings. When someone describes a city's architectural style, they're talking about how its buildings look: the shapes, materials, decorations, and overall design that make those buildings distinctive.

Architecture is the art and science of designing structures where people live, work, worship, or gather. An architect is someone who plans buildings, thinking about both how they'll look and how they'll work. The Roman Colosseum, with its massive arches and oval shape, shows the architectural genius of ancient Rome. Frank Lloyd Wright's houses, with their low roofs and natural materials, demonstrate a distinctly American architectural vision.

Architectural can describe anything connected to this work: architectural drawings are the detailed plans architects create, architectural features are the specific design elements that make a building interesting (like tall columns or arched doorways), and architectural beauty refers to how pleasing a building is to look at.

The word appears beyond buildings too. Someone might praise the architectural structure of a novel, meaning how the author carefully constructed and organized the story, much like an architect plans a building. This metaphorical use recognizes that architecture is fundamentally about thoughtful, purposeful design.