Definition of sack:
; especially a large bag of strong, coarse material for storage and handling of various commodities
, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket
, a grocery
sack; or, a small bag for small items, a satchel
; the amount
a sack holds
"iâ€™m tired. I'm gonna hit the sack."
"he was sacked last September."