Idioms

on active duty
doing full-time service (usually used in the military when someone is doing full-time service)
The soldiers were on active duty when the hurricane reached the shore.

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  • on again, off again
  • on all fours
  • on an even keel
  • on and off
  • on and on
  • on any account
  • on approval
  • on behalf of (someone)
  • on bended knee
  • on board
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  • make (someone or something) available to (someone)
  • have been through the mill
  • weigh down on (someone)
  • made to measure
  • strictly on the up-and-up
  • make a meal of (something)
  • see stars
  • knock (someone) dead
  • make it one's business to (do something)
  • in return for (someone or something)


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