Fizzle/ˈfɪzl/ Definition 1 of 3Pro Tip 1/3Physical Descent Used when something literally weakens, like a light dimming. The torchlight started to fizzle, leaving us in near darkness. Pro Tip 2/3Metaphorical Use Often describes energy or interest levels decreasing. After the intermission, the play's momentum fizzled. Pro Tip 3/3Reduced Intensity Indicates a slow fade rather than an immediate end. The party didn't end, it just fizzled as guests left.