Definition of firing on all four cylinders in English:

firing on all (four) cylinders

  • Working or functioning at a peak level.
    More example sentences
    • On a technical level, Scorsese is firing on all cylinders, but emotionally the film is a bit distant.
    • Records are there to be broken and Celtic are firing on all cylinders just now.
    • Last night was a great example of a band firing on all cylinders and while we don't think the new record quite survived the transition to a big label intact, live at least, every song is a killer.
See parent entry: fire

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Pronunciation: kəːf
noun
a slit made by cutting with a saw