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 fighters crucial to air superiority > Air Force > Article Display

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

US Defense Partner Approves Fifth-Generation Fighters To Keep Up With China

Japan Needs More Fifth-Generation Jets

What are 5th generation fighter jets? Why does India need them? – Firstpost

J-20 vs F-22 vs F-35: How does China's fifth-generation warplane compare to the West's?

Did China downgrade its J-20 stealth fighter from 5th generation to 4th? - The Week

Fifth-generation fighter - Wikipedia

List of all Fifth Generation Fighters in the World

Fifth-generation fighter - Wikipedia

Fifth-generation fighter - Wikipedia

All Fifth & Sixth Generation Aircraft Size Comparison (2022)