What does the word vacuum mean?

Usage examples for vacuum

  1. One swooper they brought to earth with a disintegrator ray beam, by creating a vacuum beneath it, but they did it no serious damage, for its fall was a light one. – The Airlords of Han by Philip Francis Nowlan
  2. This occurred every two or three minutes, and, remembering what Thorwald had previously told us, we realized that we were riding in a perfectly tight car in a vacuum tube and that these short but frequent stops were to keep us supplied with fresh air. – Daybreak: A Romance of an Old World by James Cowan
  3. He was the first to obtain a vacuum by means of mercury; and he also improved the microscope and the telescope. – More Hunting Wasps by J. Henri Fabre