reverb Share definition Flag A special effect applied to an audio signal to make it sound as if you're now hearing that sound in a tunnel or some other different room, with some depth and a bit of echo. Many guitar amplifiers have a "reverb" knob. reverb by Bill M. August 27, 2004 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug