What is a fifth-generation fighter aircraft?

Any conversation about Australia
Any conversation about Australia's commitment to the F-35 Joint Strike Fighter refers to it as a fifth-generation fighter aircraft. But what exactly is a fifth-generation aircraft, and why is it important?

Fifth-generation fighter - Wikipedia

What does it actually mean when we say 'fifth-generation' fighter?

5th-Gen vs 4th-Gen: F-35 Fighter Pilots Compare 4th-Gen Jets to F-35 - Warrior Maven: Center for Military Modernization

Russian conglomerate develops AI communications for fifth-gen aircraft - Airforce Technology

The F-35 JSF: what is a fifth-generation fighter aircraft?

Russia's Aerospace Force to get Su-57 fifth-generation fighter jets by year-end - Military & Defense - TASS

Fifth-generation fighter - Wikipedia

With T-7 on the way, why is ACC eyeing a new trainer?

tilstrækkelig Havanemone Sovereign 5 generation fighter jet overskud ønskelig bibliotekar

China Displays New 5th Generation Stealth Fighter – The Diplomat

Fifth generation fighter jets - A Chinese, Russian, Indian and US arms race.