herd (Noun) — A group of cattle, sheep or other domestic mammals all of the same kind that are herded by humans.
herd (Noun) — A group of wild mammals of one species that remain together: antelope, elephants, seals, whales or zebra.
herd (Noun) — A crowd especially of ordinary or undistinguished persons or things. ex. "the children resembled a fairy herd"
herd (Verb) — Cause to herd, drive, or crowd together. ex. "We herded the children into a spare classroom"
herd (Verb) — Move together, like a herd.
herd (Verb) — Keep, move, or drive animals. ex. "Who will be herding the cattle when the cowboy dies?"