A shadowy or borderline area, where normal rules and boundaries do not apply

The state or property of being shadowy.

plural of shadowiness

One who shadowboxes.

In a shadowy manner.

(computer graphics) The generation of shadows from a three-dimensional model.

(obsolete) Shadowy; vague.

(archaic) Third-person singular simple present indicative form of shadow

(archaic) second-person singular simple present form of shadow

(transitive, Internet) To ban a discussion board user without their knowledge, allowing them to continue reading and commenting, but rendering their comments invisible to other users.