A faint red dwarf star associated with the bright binary star Alpha Centauri. It is the closest known star to the solar system (distance 4.24 light years).
〔天文〕（半人马座）比邻星
Origin
Latin, 'nearest (star) of Centaurus'.
Definition of Proxima Centauri in US English:
Proxima Centauri
proper nounˌpräksəmə ˌsenˈtôrˌī
Astronomy
A faint red dwarf star associated with the bright binary star Alpha Centauri. It is the closest known star to the solar system (distance 4.24 light years).