Hōr'i-zōn'tal, a.
a. [Fr. & Sp. horizontal, It. orizzontale.]
Sense 1. Pertaining to, or near, the horizon.
Sense 2. Parallel to the horizon; on a level; as, an horizontal line or surface.
Sense 3. Measured or contained in a plane of the horizon; as, horizontal distance.
Horizontal fire (Mil.), the fire of guns and howitzers under low angles of elevation.