What does the word horizontal mean?

Usage examples for horizontal

  1. The cylinder of the tractor pointed directly downward so that the blast was discharged through the very centre of the Ring, but it could be swung through a small angle in any direction, and by means of this slight deflection the horizontal motion of the machine secured. – The Man Who Rocked the Earth by Arthur Train Robert Williams Wood
  2. In a few minutes, without scarcely an exchange of a word, they were all out of the brig, and Francisco pushed off just as the flames burst from the cabin- windows, darting out in a horizontal line like the tongues of fiery serpents. – The Pirate by Frederick Marryat