[1] : The Collaborative International Dictionary of English v.0.48

overhead \o`verhead"\, adv.
   aloft; above; in or attached to the ceiling or roof; in the
   story or upon the floor above; in the zenith.
   1913 webster

         while overhead the moon
         sits arbitress.                          --milton.
   1913 webster

   note: also used adjectively; as, an overhead crane, gear,
         etc.
         1913 webster

   overhead engine, a vertical steam engine in which the
      cylinder stands above the crank.

   overhead work, a general term in manufactories for
      countershafting and gearing, when overhead.
      1913 webster
see also:
overhead engine overhead work 

[2] : The Collaborative International Dictionary of English v.0.48

overhead \o"verhead`\, n.
   1. same as overhead expenses.
      pjc

   2. a compartment on a train, bus, or airplane used for
      storage of luggage or accessory equipment; called also
      overhead compartment.
      pjc

   3. sports a stroke with a racket in which the ball is
      struck with the racket over the head, moving in a downward
      motion; also called overhead stroke.
      pjc overhead charges
see also:
overhead expenses 

[3] : WordNet (r) 2.0

overhead
     adj : located or originating from above; "an overhead crossing"
           ant: surface, subsurface
     n 1: 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, budget
          items
     2: 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
     3: computer science the disk space required for non-data
        information used for location and timing syn: disk
        overhead
     4: a transparency for use with an overhead projector syn: viewgraph
     5: nautical the top surface of an enclosed space on a ship
     6: a hard return hitting the tennis ball above your head syn:
        smash
     adv 1: above your head; in the sky; "planes were flying overhead"
     2: above the head; over the head; "bring the legs together
        overhead"
see also:
surface subsurface operating expense operating cost budget items command processing overhead time 
command processing overhead command overhead disk overhead viewgraph smash 

[4] : Moby Thesaurus II by Grady Ward, 1.0

76 moby thesaurus words for "overhead":
   above, abovestairs, airward, aloft, aloof, budget, budget items,
   burden of expenditure, carrying charge, ceiling, charges, cost,
   cost of living, cost-of-living allowance, cost-of-living index,
   costs, direct costs, disbursals, distributed costs, eaves,
   elevated, expenditures, expense, expense account, expenses,
   general expenses, high, high up, housetop, in the air,
   in the clouds, indirect costs, labor costs, lantern, liabilities,
   maintenance, material costs, on high, on stilts, on the peak,
   on tiptoe, operating costs, operating expense, outlay, over,
   overhead, penthouse, plafond, prime cost, raised, replacement cost,
   ridgepole, roof, roof garden, roof-deck, roofage, roofing,
   roofpole, rooftop, rooftree, shingles, skylight, skyward, slates,
   straight up, swindle sheet, tiles, tiptoe, to the zenith, top,
   unit cost, up, upper, upstairs, upward, upwards

[5] : The Free On-line Dictionary of Computing (27 SEP 03)

overhead
     
        1. resources in computing usually processing time or storage
        space consumed for purposes which are incidental to, but
        necessary to, the main one.  overheads are usually
        quantifiable "costs" of some kind.
     
        examples: the overheads in running a business include the cost
        of heating the building.  keeping a program running all the
        time eliminates the overhead of loading and initialising it
        for each transaction.  turning a subroutine into inline
        code eliminates the call and return time overhead for each
        execution but introduces space overheads.
     
        2.  information, such as control, routing, and
        error checking characters, that is transmitted along with the
        user data.  it also includes information such as network
        status or operational instructions, network routing
        information, and retransmissions of user data received in
        error.
     
        3. overhead transparencies or "slides" usually 8-1/2" x 11"
        that are projected to an audience via an overhead flatbed
        projector.
     
        1997-09-01
     
     
see also:
subroutine inline 

Overhead >> O Words
Overhead, definition of term: Overhead
overhead_pag1.html

Overhead Railwa >> O Words
Overhead Railwa, definition of term: Overhead Railwa
overhead+railwa_pag1.html

Overhead Projec >> O Words
Overhead Projec, definition of term: Overhead Projec
overhead+projec_pag1.html