Support deflection describes the tendency of a structure to move downwards due to stress or external force. Synonyms for support deflection include sagging, bending, yielding, drooping, bowing, flexing, slumping and curving. These terms all describe a similar phenomenon where an object or structure loses its original shape or position due to pressure or weight. In engineering, support deflection is an important concept when designing and testing building structures, bridges, and other constructions. By understanding how different materials and designs behave under stress, engineers can create more resilient, durable and safe structures that can withstand external pressure without collapsing or failing.