the child's use of consonant-vowel (CV) syllables.

gibberish resembling the sounds of a baby

talking idly or incoherently; "blithering (or blathering) idiot"; "jabbering children"; "gabbling housewives"; "a babbling hospital inmate"

continuous low murmuring sound; as especially of water; "a babbling brook"

The sound a baby makes when he combines a vowel and consonant and repeats them over again (e.g., ba-ba-ba, ga-ga-ga).

long strings of sounds that children begin to produce at 4 months of age

Consonant-vowel utterances that characterize the infant's first attempts to vocalize.

Babbling is a stage in child language acquisition, during which an infant appears to be experimenting with making the sounds of language, but not yet producing any recognizable words. (Crucially, the larynx or voicebox, originally high in the throat to let the baby breathe while swallowing, descends during 'the first year of life', allowing a pharynx to develop and all the sounds of human speech to be formed [Naomi S. Baron, Growing up with Language: How Children Learn to Talk (Reading,MA: Addison-Wesley, 1992), p41-43, ISBN 0-201-55080-6].)