Definition of illegal sometimes disparaging + offensive : a person who enters or lives in a country without the documentation required for legal entry or residence
aerial noun [C]. âº a âstructure made of âmetal ârods or âwires that âreceives or âsends out âradio or âtelevision âsignals.
â¢ AVIATION (noun) The noun AVIATION has 4 senses: 1. the aggregation of a country's military aircraft. 2. the operation of aircraft to provide transportation. 3. the art of operating aircraft. 4. travel via aircraft. Familiarity information: AVIATION used as a noun is uncommon.