What is the meaning of girdle?

noun

• An encircling or ringlike structure.
• A band of material around the waist that strengthens a skirt or trousers.
  • synonyms: cincture, sash, waistband, waistcloth
• A woman's close-fitting foundation garment.
  • synonyms: corset, stays

verb

• Cut a girdle around so as to kill by interrupting the circulation of water and nutrients.
  • usage: "girdle the plant"
  • synonyms: deaden
• Put a girdle on or around.
  • usage: "gird your loins"
  • synonyms: gird