Meet is talk to somebody for the first time or by chance. - They met Peter during their holidays - I would like to meet him!
Meet is to arrange to be at a particular place at a specific time. - Let's meet for dinner after our exams - The Reading Club members meet on Saturdays
Know is to have a relationship with someone after having been with this person for some time. - I have known Rick ever since we were at school. - I know Alison and Daniel, they live in Boston.