The vulnerability in copy protection schemes for non-interactive digital works, whereby the eventual analog output can be copied (as by re-recording music as it plays) even if the digital representation is secure.

A submarine cave or sinkhole, a roughly circular, steep-walled depression that is typically anoxic below a certain depth.

The amount of space in a newspaper or broadcast news show that remains for journalism after advertising has been placed; the amount of content a news provider needs to create in every publishing cycle.

(military) A small, usually camouflaged hole dug in the ground where someone can hide.

(engineering) A hole that does not extend completely through the wall; a dead end hole.

simple past tense and past participle of hole up

(authorship) A gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot.

plural of hole card

(mathematics) A cycle, in a graph, that has no cycle chord

plural of hole punch