American Institute of Architects

Architecture
Architecture concerns function, structure, and beauty. Function determines the size and shape of spaces for human needs and the relationship of such spaces, one to the other. Structure is the enclosure of these spaces and their adaption in terms of color, materials, and mechanical controls for human habitation. Beauty is the quality that classifies a structure with architecture and which gives pleasure to those about it.

-- Architect's Handbook of Professional Practice
 
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