Definition of running time in US English:

running time

noun

  • 1Chiefly US= running season. Now rare.

  • 2The scheduled length of time to be taken by a vehicle in the completion of a certain route; the actual time taken in one such journey.

  • 3The time or a period during which a machine or device is in operation; the total length of time for which a machine or device can operate before needing to be recharged, repaired, etc.

  • 4The actual duration of a performance, film, song, etc., usually excluding any intermissions or interruptions.

  • 5Computing the length of time taken by the execution of a program or task.

Origin

Mid 17th century; earliest use found in John Rowland (fl. c1658). From running + time.

Pronunciation

running time

/ˈrʌnɪŋ tʌɪm/