ISS
n. uncountablen. Stands for International Space Station. A large spacecraft where astronauts from different countries live and work while they orbit the Earth.
n. Abbreviation for International Space Station. A modular space station in low Earth orbit, serving as a microgravity and space environment research laboratory. A proper noun, typically used with the definite article.
The ISS orbits the Earth every ninety minutes.
Astronauts on the ISS conduct experiments that help scientists understand how long-term space travel affects the human body.
As a collaborative project between five space agencies, the ISS represents a significant achievement in international diplomacy and complex aerospace engineering.
Typically preceded by the definite article ('the ISS').