Definition of "warbling" []

• Present participle of warble. (verb)
• A sound that warbles. (noun)

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• "He heard a pair of water rails (Rallus aquaticus) warbling from the lake beyond a grove, and he said with the voice of a commentator on a recording of wild birds: "They are water rails"."
• "That is called warbling, or trilling, or trolling, or something."
• "One person noticed "warbling" in the background, that is likely the binaural beat that is encoded into the background music."