To talk rapidly and continuously in a foolish, excited, or incomprehensible way. The toddler began to babble excitedly about her day at the park.
To make a continuous murmuring sound, like a brook or stream. The brook babbled gently as it wound through the forest.
To disclose or utter something quickly and thoughtlessly, often unintentionally. He babbled the confidential information before realizing what he had done.