What does "babble" mean?

Additional senses

1. 2.To talk much; to chatter; to prate.
2. 3.To make a continuous murmuring noise, as shallow water running over stones. In every babbling he finds a friend. Wordsworth. Note: Hounds are said to babble, or to be babbling, when they are too noisy after having found a good scent.
3. 4.To utter in an indistinct or incoherent way; to repeat,as words, in a childish way without understanding. These [words] he used to babble in all companies. Arbuthnot.
4. 5.To disclose by too free talk, as a secret.
5. 6.Idle talk; senseless prattle; gabble; twaddle. "This is mere moral babble." Milton.
6. 7.Inarticulate speech; constant or confused murmur. The babble of our young children. Darwin. The babble of the stream. Tennyson.