'overhead' definitions:

Definition of 'overhead'

(from WordNet)
adverb
Above your head; in the sky; "planes were flying overhead"
adverb
Above the head; over the head; "bring the legs together overhead"
adjective
Located or originating from above; "an overhead crossing" [ant: subsurface, surface]
noun
The expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes [syn: operating expense, operating cost, overhead, budget items]
noun
(computer science) the processing time required by a device prior to the execution of a command [syn: command processing overhead time, command processing overhead, command overhead, overhead]
noun
(computer science) the disk space required for information that is not data but is used for location and timing [syn: disk overhead, overhead]
noun
A transparency for use with an overhead projector [syn: viewgraph, overhead]
noun
(nautical) the top surface of an enclosed space on a ship
noun
A hard return hitting the tennis ball above your head [syn: overhead, smash]

Synonyms of 'overhead'

From: Moby Thesaurus