Meaning

1. (informal) Expression signifying a pause or hesitation.
2. (informal) Expression used to imply meaning, rather than say it, such as when a person is embarrassed.
3. (informal) Used as a rhetorical question to confirm agreement, knowing or understanding at the end of a statement.
4. (informal) Used to introduce information.
5. Used other than figuratively or idiomatically: see you, know.