| 1. | at right angles to the vertical; parallel to level ground. |
| 2. | flat or level: a horizontal position. |
| 3. | being in a prone or supine position; recumbent: His bad back has kept him horizontal for a week. |
| 4. | near, on, or parallel to the horizon. |
| 5. | of or pertaining to the horizon. |
| 6. | measured or contained in a plane parallel to the horizon: a horizontal distance. |
| 7. | (of material on a printed page, pieces on a game board, etc.) extending across, from the left to the right of the viewer. |
| 8. | of or pertaining to a position or individual of similar status: He received a horizontal promotion to a different department, retaining his old salary and title. |
| 9. | Economics. of or pertaining to companies, affiliates, divisions, etc., that perform the same or similar functions or produce the same or similar products: Through horizontal mergers the company monopolized its field. |
| 10. | anything horizontal, as a plane, direction, or object. |
horizontal
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