1. To demand that something happens or that a person does something: Jillian didn't want to go to the dentist, but her husband insisted because she stumbled and fell against a wall and broke her two front teeth.
2. To say something in a very forceful way which doesn't allow for any disagreement: Henry insisted that his son didn't mean to be impolite when he disagreed with what his aunt said about his web site.

The couple next to Karl and Janine insisted on talking during the movie.