Definition of "nil"

As to Aristotle's influence on him, we are left free to conjecture whatever seems to us most plausible. For my part, I should suppose it nil.

1946, Bertrand Russell, History of Western Philosophy, I.19

But after two or three hours and nil results, you have to accept that the trail is cold and you can't justify that level of manpower.

1982, Gavin Lyall, Conduct of Major Maxim, Hodder & Stoughton Ltd