Definitions of sack:

• noun:   the plundering of a place by an army or mob; usually involves destruction and slaughter

  Example: "The sack of Rome"

• noun:   a bag made of paper or plastic for holding customer's purchases
• noun:   a woman's full loose hiplength jacket
• noun:   any of various light dry strong white wine from Spain and Canary Islands (including sherry)
• noun:   the quantity contained in a sack
• noun:   a loose-fitting dress hanging straight from the shoulders without a waist
• noun:   a hanging bed of canvas or rope netting (usually suspended between two trees); swing easily
• noun:   an enclosed space
• noun:   the termination of someone's employment (leaving them free to depart)
• verb:   plunder (a town) after capture

  Example: "The barbarians sacked Rome"

• verb:   put in a sack

  Example: "The grocer sacked the onions"

• verb:   make as a net profit
• verb:   terminate the employment of
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9190)