- noun the supplementary SI unit of measurement for solid angle.
- Unit of solid angular area, e.g. on the celestial sphere, consisting of a square one radian (angular measure) on a side
- A unit of measure of solid angles. There are 4π steradians in a sphere, thus one steradian equals about 0.079577 sphere. Its symbol is sr.
Information & Library Science
- abbreviation in Internet addresses, the top-level domain for Suriname