1. first official airmail flew on 11 February 1911 between Allahabad and Naini, India; 2. inscription on stamps of many nations for mail carried by air; 3. any form of mail transported by air.
1. first official airmail flew on 11 February 1911 between Allahabad and Naini, India; 2. inscription on stamps of many nations for mail carried by air; 3. any form of mail transported by air.