a. Excessively heavy. [ 1913 Webster ]

adv. Aloft; above; in or attached to the ceiling or roof; in the story or upon the floor above; in the zenith. [ 1913 Webster ]

While overhead the moon
Sits arbitress. Milton. [ 1913 Webster ]

Also used adjectively; as, an overhead crane, gear, etc. [ 1913 Webster ]

Overhead engine, a vertical steam engine in which the cylinder stands above the crank. --
Overhead work, a general term in manufactories for countershafting and gearing, when overhead. [ 1913 Webster ]

n. 1. same as overhead expenses. [ PJC ]

2. A compartment on a train, bus, or airplane used for storage of luggage or accessory equipment; called also overhead compartment. [ PJC ]

3. (Sports) A stroke with a racket in which the ball is struck with the racket over the head, moving in a downward motion; also called overhead stroke. [ PJC ]

{ etc. } (Accounting) Those general charges or expenses in any business which cannot be charged up as belonging exclusively to any particular part of the work or product, as where different kinds of goods are made, or where there are different departments in a business; -- called also fixed charges, establishment charges, or (in a manufacturing business) administration charges, selling charges, and distribution charges, etc. [ Webster 1913 Suppl. ]