Quick definitions from WordNet (sack)

▸ noun:  the plundering of a place by an army or mob; usually involves destruction and slaughter ("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 ("The barbarians sacked Rome")
▸ verb:  put in a sack ("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)

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▸ Also see sack