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English definition of “Mark”

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Mark

noun uk   /mɑːk/ us    /mɑːrk/
used before a number to describe a particular version of a machine, especially one that is an improvement on the original version: The car has enjoyed modest success since its launch, but the Mark 2 version is expected to be far more popular. UK used before a number to show what temperature you should use for cooking something in a gas oven: Cook at Mark 5 for 20 minutes.
(Definition of Mark noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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