Definitions

1. verb

to talk or speak at length about something, especially something trivial or insignificant

“The politician blathered on about his plan, but never got to the point.”

2. noun

talk or speech that is meaningless or excessively trivial

“The professor’s blather during the lecture was a source of frustration for the students.”

3. noun

a stream or flow of something, especially water

“The blather of the waterfall was a soothing sound.”