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  1. Oxford Dictionary

    service ceiling

    • n.
      the maximum height at which a particular type of aircraft can sustain a specified rate of climb.

    • noun: service ceiling, plural noun: service ceilings

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    service ceiling

    • IPA[ˈsərvəs ˈsēliNG]
    • n.
      the maximum height at which an aircraft can sustain a specified rate of climb dependent on ...

    Oxford American Dictionary