What is the meaning of overhead?

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.
  • synonyms: operating expense, operating cost, budget items
• Computer science. ( the processing time required by a device prior to the execution of a command)
  • synonyms: command processing overhead time, command processing overhead, command overhead
• Computer science. ( the disk space required for information that is not data but is used for location and timing)
  • synonyms: disk overhead
• A transparency for use with an overhead projector.
  • synonyms: viewgraph
• Nautical) the top surface of an enclosed space on a ship. (
• A hard return hitting the tennis ball above your head.
  • synonyms: smash

adjective

• Located or originating from above.
  • usage: "an overhead crossing"

adverb

• Above your head; in the sky.
  • usage: "planes were flying overhead"
• Above the head; over the head.
  • usage: "bring the legs together overhead"