white space
n.— «Just about everyone in the iSeries community agrees that the key to survival of the platform is growth in new business opportunities—the “white space” as the hardware vendors refer to it. Let’s hope that the iSeries ISVs and resellers will fill that white space with slot machines.» —“Will Pennsylvania Casinos Gamble on the iSeries?” by Mary Lou Roberts iSeries Network (U.S.) Dec. 7, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...