Expansion or extension: the act of spreading out or lengthening; used for physical, geographical, biological, or figurative expansion.
都市の周辺で住宅地の伸展が急速に進んでいる。
Residential development is rapidly expanding around the outskirts of the city.
理学療法で肩の伸展運動を行い、可動域を広げた。
In physical therapy we performed shoulder extension exercises to increase the range of motion.
材料の伸展性を調べるために引張試験を行った。
We conducted a tensile test to examine the material's extensibility.