What does "fade" mean?

What does fade mean? Fade has multiple meanings. As verb, to fade means to gradually lose color, brightness, sound, strength, or to disappear slowly, as in colors fade in sun, light fades at dusk, memory fades over time, and sound fades away. As noun, fade means gradual transition, especially in film where fade out means image darkens to black and fade in means emerges from black, and in audio where volume gradually decreases to silence or increases from silence. In barbering, fade is popular haircut where hair tapers from short at sides to longer on top, with types low fade, mid fade, high fade, skin fade, bald fade, considered clean and stylish. In slang, fade can mean fight, as in catch a fade means to fight, and to fade someone can mean to gradually ghost or ignore. In general, core idea is gradual change, diminishing until gone or blending from one length to another, whether color dimming, sound lowering, image darkening, hair blending, or presence disappearing, opposite of abrupt change, implying slow, smooth transition.