1. A unit of energy equal to the work done by a power of 1000 watts operating for one hour
   - kilowatt hour, kW-hr, B.T.U., kWh

Type of: energy unit, heat unit, work unit

• opencast mining
• opencut
• opened
• opener
• openhanded
• openhandedness
• openhearted
• opening
• opening line
• opening move
• opening night
• openly
• openmouthed
• openness
• openside plane
• openwork
• opepe
• opera
• opera buffa
• opera cloak
• opera comique
• opera company
• opera glasses
• opera hat
• opera hood