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.
Archaic. the science or art of ascending and traveling in the air in lighter-than-air vehicles. 2. the technology or art of flying airplanes. â aeronaut, n. â aeronautic, aeronautical, adj.