The ".NET" label was applied to a bunch of things at Microsoft.
It was also an early name given to their social networking / IM things.
But for the last 20-ish years it's really only been applied to things related to the .NET Framework.
So, yes - Visual Basic.NET is a language - it's the language that replaced Visual Basic 6. It compiles to the Intermediate Language (IL) that the Common Language Runtime (CLR) executes. There are other languages that compile to IL, too like C#, F#.
The .NET Framework is really a bunch of libraries and tools that are packaged together.
The .NET Standard is a standard that allows you to build a library to a known set of supported libraries and IL / CLR features.
So, yes, depending on which specific part you're referring to - it's all of those.
