To utter words indistinctly or unintelligibly; to utter inarticulate sounds
The men were babbling, so we couldn't make sense of anything.
To talk incoherently; to utter meaningless words.
To talk too much; to chatter; to prattle.
To make a continuous murmuring noise, like shallow water running over stones.
Hounds are said to babble, or to be babbling, when they are too noisy after having found a good scent.
To utter in an indistinct or incoherent way; to repeat words or sounds in a childish way without understanding.
To reveal; to give away (a secret).