I am interested, what is the definition of determinism that you are using? If it "means nothing in practice", and can be true/not true regardless of whether it

I am interested, what is the definition of determinism that you are using? If it "means nothing in practice", and can be true/not true regardless of whether it is possible (even in theory) to test it - then I assume that it is unrelated to science and you are using it in a philosophical sense?