Definition of "ignoring"

Employ two revokes, two trumpings of your partner's best card and two ignorings of a call — all in the same hand!

1923, William Henry Koebel, All Aboard: A Frivolous Book, page 102

We ignore various far-fetched possibilities, as hard-headed detectives should. But S does not ignore them. S is by profession a sceptical epistemologist. He never ignores much of anything. If it is our own ignorings that matter, then we are wrong, because S never knew much of anything.

1999, David Lewis, Papers in Metaphysics and Epistemology, volume 2, page 437