What is the meaning of hours?

noun

• A period of time equal to 1/24th of a day.
  • usage: "the job will take more than an hour"
  • synonyms: hour, hr, 60 minutes
• Clock time.
  • usage: "the hour is getting late"
  • synonyms: hour, time of day
• A special and memorable period.
  • usage: "it was their finest hour"
  • synonyms: hour
• Distance measured by the time taken to cover it.
  • usage: "we live an hour from the airport"; "its just 10 minutes away"
  • synonyms: hour, minute
• A period of time assigned for work.
  • usage: "they work long hours"
• An indefinite period of time.
  • usage: "they talked for hours"