c.1440, "action or process of building or construction," from L. structura "a fitting together, adjustment, building," from structus, pp. of struere "to pile, build, assemble," related to strues "heap," from PIE *stere- "to spread, extend, stretch out" (cf. Skt. strnoti "strews, throws down;" Avestan star- "to spread out, stretch out;" Gk. stornymi "strew," stroma "bedding, mattress," sternon "breast, breastbone;" L. sternere "to stretch, extend;" O.C.S. stira, streti "spread," strama "district;" Rus. stroji "order;" Goth. straujan, O.H.G. strouwen, O.E. streowian "to sprinkle, strew;" O.E. streon "strain," streaw "straw, that which is scattered;" O.H.G. stirna "forehead," strala "arrow, lightning bolt;" O.Ir. fo-sernaim "spread out," srath "a wide river valley;" Welsh srat "plain"). Meaning "that which is constructed, a building or edifice" is from 1615. Structured "organized so as to produce results" is from 1959.