(a) As used in this Code section, the term "firefighter" means:
"Firefighter" means any able-bodied person at least 18 years of age who has been duly appointed by a legally constituted fire department and who has the responsibility of preventing and suppressing fires, protecting life and property, and performing other duties [...]
"Firefighter" means any person who is employed as a
professional firefighter on a full-time basis of at least 40 hours
per week by any municipal, county, or state government fire
department employing three or more firefighters and who has the
responsibility of [...]
"Firefighter" means the permanent members of any paid fire
department of any municipality of this state having a population
of 20,000 or more according to the United States decennial census
of 1980 or any future such census who are employed for and subject
to [...]
"Firefighter" means an individual who is assigned by a fire
department to fire-fighting activity and is required to respond to
alarms and perform emergency action at the location of a fire, a
hazardous materials emergency, or other emergency incident [...]
(3) "Firefighter" means a person who is a full-time employee of a
fire department who in the course of full-time employment by and
within a department either:
(3) "Firefighter" means a person who is:
