Definition from Wiktionary, the free dictionary
vanishingly (not comparable)
- So as to vanish, or appear to vanish, especially very small, very rare.
- a vanishingly small object on the horizon
- 1996, Iain M. Banks, Excession
- When they weren't running ships, meddling with alien civilisations or planning the future course of the Culture itself, the Minds existed in those fantastic virtual realities, sojourning beyondward into the multi-dimensioned geographies of their unleashed imaginations, vanishingly far away from the single limited point that was reality.