Meaning

• A wandering troop or gang; especially, a clan or tribe of a nomadic people (originally Tatars) migrating from place to place for the sake of pasturage, plunder, etc.; a predatory multitude.

• A large number of people.

  "We were beset by a horde of street vendors who thought we were tourists and would buy their cheap souvenirs."

Meaning

• To travel en masse, to flock