a.

1. 水平的；横的；卧式的
   The ground was horizontal to the flagpole.

   旗杆直竖在地面上。

2. 地平线的
3. 同一阶层的
   a horizontal transfer of an employee

   员工的平行调动

n.

1. 水平线；水平面；水平位置[the S]

adj.

1. parallel to the plane of the horizon.
2. being at or involving the same level of a hierarchy:
   horizontal class loyalties.
   ▸based on similarity or uniformity.
3. of or at the horizon.

n.

1. a horizontal line or plane.
2. a horizontal structure.