overhead vs under

overhead

adj
  • located above, especially over the head 

  • kicked over one's own head 

noun
  • Data or steps of computation used only to facilitate the computations in the system and not directly related to the actual program code or data being processed. 

  • 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. 

  • Wasted money. 

  • An overhead projector. 

  • A sheet of transparent material with an image used with an overhead projector; an overhead transparency. 

  • The expense of a business not directly assigned to goods or services provided. 

  • The items or classes of expense not directly assigned to goods or services provided. 

  • The ceiling of any enclosed space below decks in a vessel. 

  • The system of overhead wires used to power electric transport, such as streetcars, trains, or buses. 

  • A compartment above the seats for stowing luggage in a passenger aircraft. 

  • An overhead throw. 

  • A smash. 

adv
  • Above one's head; in the sky. 

under

adj
  • Lower; beneath something. 

  • Insufficient or lacking in a particular respect. 

  • Under anesthesia, especially general anesthesia; sedated. 

  • In a state of subordination, submission or defeat. 

adv
  • Insufficiently. 

  • In or to a lower or subordinate position, or a position beneath or below something, physically or figuratively. 

  • In or into an unconscious state. 

  • So as to pass beneath something. 

noun
  • The amount by which an actual total is less than the expected or required amount. 

prep
  • Using or adopting (a name, identity, etc.). 

  • Subordinate to; subject to the control of; in accordance with; in compliance with. 

  • Within the category, classification or heading of. 

  • Below the surface of. 

  • Less than. 

  • In the face of; in response to (some attacking force). 

  • In or at a lower level than; in the area covered or surmounted by. 

  • From one side of to the other, passing beneath. 

How often have the words overhead and under occurred in a corpus of books? (source: Google Ngram Viewer )