Definition of "humming" []

• Present participle of hum. (verb)

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• "Speech pathologist Dr. Morton Cooper tells us humming is the best way to find your optimal pitch."
• "There's a buzzword humming on Capitol Hill and it is coming up in discussions from economic development and microfinance, to U.S. safety and security, to population growth and global health."
• "Did you immediately begin humming the tune from this Weebls animation?"