What is "expanding upon"

Usage examples of "expanding upon".

He gazed at the posters on the wall as if interested, trying to shut out Flap, who was expanding upon his theme: Jake Grafton was one cool dude.

Oglethorpe was expanding upon Jimmy's condition, although he had yet to examine the subject in person.

There was a fascinating paper done recently, expanding upon a notion expressed in, of all things, a newly recovered twentieth-century piece of fiction.

Considering just where he was attempting to steer this conversation, it might be better to avoid expanding upon the misfired assassination attempts of the last twenty-five years.

Like the KGB, the Agency has long sponsored a few behavioral psychologists and biochemists who have been expanding upon Rotenhausen's research.

Furthermore, there is a consistent pattern of witchers expanding upon testimony.

She would record the details of these foreign lands for the guild's records, expanding upon the vast knowledge the sages swore to safeguard for civilization.

The gold-covered timbers were torn apart as the bolt smashed through them, expanding upon impact with terrible heat.