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Definition

Labouring with great effort and diligence; working hard.

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In Context

  • "I'm sorry I can't make it to the party—I'm going to be hard at work all day."
  • "The relegation of locomotives to storage seemed to be on a very unsystematic basis on all three principal Irish railways: while one member of a class was rusting in a yard, another might be hard at work in revenue-earning service—[…]."
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See Also

  • hard at it