Definitions
1.NounA bubbling, gurgling sound, as of a creek.
2.NounA gush of rapid speech.
3.NounThe turbulent boundary layer about a moving streamlined body.
4.VerbTo bubble; to gurgle.
5.VerbTo babble; to speak in an excited rush."She burbled on, as if I cared to listen."
6.NounTrouble; disorder.
7.VerbTo trouble or confuse.