an agency in the Department of Transportation that is responsible for the safety of civilian aviation
"The pilot filed his flight plan directly with the FAA before takeoff."
The letter ف in the Arabic script.
"In the phrase "Fa'a", the first character is an instance of faa, representing the letter ف in the Arabic script."
In plain English: FAA is the government agency that sets safety rules for airplanes and pilots.
"The faa in his earpiece crackled with static during the storm."
Initialism of Federal Aviation Administration.
"The pilot received clearance from the FAA to land at Denver International Airport."