Meaning

• To remove lice from.

  "A veterinarian could delouse your dog."

• To apply insecticides or insect repellents to, in order to be sure that no lice or other parasites are present.

  "During the Korean Conflict, American soldiers were deloused with DDT upon entering basic training."

• To remove malicious software, such as viruses, trojans, spyware, or worms, from.

  "A deloused computer may still be considered no longer trustworthy."