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

kilowatt hour \kil"owatt` hour\ elec.
   a unit of work or energy equal to that done by one kilowatt
   acting for one hour; -- approximately equal to 1.34
   horse-power hour.
   webster 1913 suppl.

[2] : WordNet (r) 2.0

kilowatt hour
     n : a unit of energy equal to the work done by a power of 1000
         watts operating for one hour syn: kw-hr, board of
         trade unit, b.t.u.
see also:
kw-hr board of trade unit b.t.u. 

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

53 moby thesaurus words for "kilowatt hour":
   abampere, abcoulomb, abfarad, abhenry, abohm, abvolt, ampere,
   ampere-foot, ampere-hour, ampere-minute, atomerg, calorie, coulomb,
   dinamode, dyne, energid, erg, farad, foot-pound, henry,
   horsepower-hour, horsepower-year, joule, kilogram-meter,
   kilovolt-ampere, kilowatt, megacoulomb, megavolt, megawatt, megohm,
   mho, microhenry, micromho, micromicrofarad, microvolt, microwatt,
   milliampere, millihenry, millivolt, ohm, ohm-mile, photon,
   picofarad, quantum, statampere, statcoulomb, statfarad, statvolt,
   volt, volt-coulomb, volt-second, watt, watt-hour

Kilowatt Hour >> K Words
Kilowatt Hour, definition of term: Kilowatt Hour
kilowatt+hour_pag1.html

Hour >> H Words
Hour, definition of term: Hour
hour_pag1.html

Kilowatt >> K Words
Kilowatt, definition of term: Kilowatt
kilowatt_pag1.html

Zero Hour >> Z Words
Zero Hour, definition of term: Zero Hour
zero+hour_pag1.html

Man Hour >> M Words
Man Hour, definition of term: Man Hour
man+hour_pag1.html

Happy Hour >> H Words
Happy Hour, definition of term: Happy Hour
happy+hour_pag1.html

Ampere Hour >> A Words
Ampere Hour, definition of term: Ampere Hour
ampere+hour_pag1.html