A Quick and Simple Dictionary

overhead

1. Adjective.  located above, especially over the head.
2. Adjective.  (business, accounting) of, or relating to the operating expenses of a business.
3. Adjective.  (soccer) kicked over one's own head.
4. Noun.  (uncountable, business) The expense of a business not directly assigned to goods or services provided.
5. Noun.  (countable, business) The items or classes of expense not directly assigned to goods or services provided.
6. Noun.  (uncountable) Any cost or expenditure (monetary, time, effort or otherwise) incurred in a project or activity, which does not directly contribute to the progress or outcome of the project or activity.
7. Noun.  (uncountable, business|) Wasted money.
8. Noun.  (tennis) A smash.
9. Noun.  (nautical) The ceiling of any enclosed space below decks in a vessel.
10. Noun.  (transport) The system of overhead wires used to power electric transport, such as streetcars, trains, or buses.
11. Noun.  (computing) data or steps of computation that is only used to facilitate the computations in the system and is not directly related to the actual program code or data being processed.
12. Noun.  (juggling, by ellipsis) An overhead throw.
13. Adverb.  above one's head;in the sky.
14. Noun.  (countable) An overhead projector.
15. Noun.  (countable) A sheet of transparent material with an image used with an overhead projector; an overhead transparency.