Definitions of herd:

• noun:   a group of cattle or sheep or other domestic mammals all of the same kind that are herded by humans
• noun:   a group of wild animals of one species that remain together: antelope or elephants or seals or whales or zebra
• noun:   a crowd especially of ordinary or undistinguished persons or things

  Example: "The children resembled a fairy herd"

• verb:   keep, move, or drive animals

  Example: "Who will be herding the cattle when the cowboy dies?"

• verb:   move together, like a herd
• verb:   cause to herd, drive, or crowd together

  Example: "We herded the children into a spare classroom"

• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5583)