Definitions of hoop:

• noun:   a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling

  Example: "There was still a rusty iron hoop for tying a horse"

• noun:   a light curved skeleton to spread out a skirt
• noun:   a small arch used as croquet equipment
• noun:   horizontal hoop with a net through which players try to throw the basketball
• verb:   bind or fasten with a hoop

  Example: "Hoop vats"

• name:  A surname (very rare: popularity rank in the U.S.: #22959)