Meanings of largely unscripted in English

For Blair at his best, I would go to impromptu, largely unscripted occasions.

The nuclear arms race and Syria could also feature on the largely unscripted agenda.

It has achieved this durability by relying on the largely unscripted festiveness of an extended family.

Last night, in his meandering largely unscripted victory speech, Donald Trump particularly praised his staunchest surrogates, including sitting Senator Jeff Session.