adjective Located above, especially over the head.
Place your luggage in the overhead lockers.
adjective Kicked over one's own head.
noun The expense of a business not directly assigned to goods or services provided.
noun The items or classes of expense not directly assigned to goods or services provided.
noun Any cost or expenditure (monetary, time, effort or otherwise) incurred in a project or activity, which does not directly contribute to its progress or outcome.
noun Wasted money.
noun A smash.
noun The ceiling of any enclosed space below decks in a vessel.