1. Not active, temporarily or permanently
    The volcano is inactive, but is only dormant.
  2. Not functioning or operating; broken down
    The photocopier is inactive pending repair.
  3. Retired from duty or service
    Admiral Jones is now on the inactive list.
  4. Relatively inert
    Aluminium is inactive towards water.
  5. Showing no optical activity in polarized light
    Synthetic glycine is optically inactive as it contains equal amounts of the d- and l- form.

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