To inactivate something is to turn it off or to stop it from working. When you inactivate the alarm on your watch, you stop it from ringing.

  • The alarm was inactivated when the watch was turned off.

  • The virus was inactivated when the vaccine was administered.

Definition of inactivate


release from military service or remove from the active list of military service


demobilise, demobilize


make inactive



Nearby Words

inactivate Pronunciation in a video

Example Sentences for inactivate

  • 1

    The venom reduces the rate and amount of sodium inactivation.

  • 2

    A fraction of the genes along the X chromosome escape inactivation on the Xi.

  • 3

    After the digestion the samples were boiled for 10 min to inactivate the enzyme.

  • 4

    Reorganization and inactivation.

  • 5

    The inactivation is irreversible.

  • 6

    Reactivation and final inactivation.

  • 7

    On the inactivation of adrenaline in vitro.

  • 8

    Training and first inactivation.

  • 9

    Inactivated channels are closed channels.

  • 10

    Inactivation and use as a training ship.