Race is a nebulous concept.

[alpacinou]

I want to say it's difficult to define race. Can I say "it's a nebulous concept"?

Is this okay?

Race is a nebulous and slippery concept. For instance, one of the signifiers for the definition of race is "skin color" which is not immutable and can vary from one culture to another.

 

[jutfrank]

I think it's a good word to say what you mean, yes.

 

[Tdol]

It is a good sentence.