Definitions

1. interjection

A sound, typically made by a child, to express excitement or annoyance.

“The baby made a loud “bbb” sound as she tried to get her parents’ attention.”

2. noun

A series of repetitive ‘b’ sounds, often used to describe a baby’s vocalization.

“The baby’s “bbb” echoed through the house, making it hard for her mother to focus on her work.”