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?

China's First 5th Generation Fighter Jet Is Operational – The Diplomat

Turkey, Pakistan pursue world's first 'Islamic world' fighter - Asia Times

5th Generation Fighters and the TF-X Program - Defence Turkey Magazine

Su-57 fifth-generation fighter jets successfully tested in Syria - Military & Defense - TASS

The F-35 JSF: What Is a Fifth-Generation Fighter Aircraft?

10 Fastest 5th Generation Jet Fighters Estimated Speed of 5th Generation Aircraft in 2020

Stealthy, speedy, precise: What are fifth-generation fighter jets?

Fifth-generation fighter - Wikipedia

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

tilstrækkelig Havanemone Sovereign 5 generation fighter jet overskud ønskelig bibliotekar

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

Russia's Fifth-Generation Fighter Ambitions Chart