.NET runtime
The software that loads and runs a built .NET program.
The .NET runtime (the CLR plus the base class libraries) loads assemblies, JIT-compiles IL, manages memory, and runs .NET programs; installing only the runtime lets a machine run programs but not build them.
Examples
dotnet --list-runtimesshows lines likeMicrosoft.NETCore.App 10.0.5, one per installed runtime.