Meer is an Urdu word which means leader, chief, head. Kaaravaan (or Kaarwan or Kaarawan or Karwan) is a convoy, a group of people moving together.
So meer-e-kaaravan means the leader of a group, the head of a set of people who are trying to go somewhere, or do something together.
So meer-e-kaaravan means the leader of a group, the head of a set of people who are trying to go somewhere, or do something together.