airtelとは 意味・読み方・使い方

名詞

airtel (複数形 airtels)

1. (historical) A form of communication formerly used within the FBI, indicating a letter that had to be typed and mailed on the same day.
   • 1969, Donald Ray Cressey, Theft of the Nation, page 121:

     Surveillance implies that the government voluntarily disclosed the airtels so that Taglianetti might have an opportunity to establish that the tax case against him was the fruit of unlawful electronic surveillance.