- above the level of the head; in the sky在头顶, 在上面; 在上空：
a helicopter buzzed overhead.
一架直升飞机在上空轰鸣。
1
- situated above the level of the head, especially in the sky在空中的, 在头顶上的：
the sun was directly overhead.
太阳当头照。
2
- (of a driving mechanism) above the object driven（驱动装置）顶置式的：
an overhead cam four-cylinder engine.
顶置式凸轮四缸发动机。
3
- attrib.(of a cost or expense) incurred in the upkeep or running of a plant, premises, or business and not attributable to individual products or items（费用, 开支）经常的。
1
- （一般作overheads）an overhead cost or expense:经常费用; 经常开支。
2
- a transparency designed for use with an overhead projector用于高射投影器的幻灯片。
3
- an overhead compartment, especially on an aircraft（尤指飞机的）顶舱。