A sack is a large bag made of rough woven material. Sacks are used to carry or store things such as vegetables or coal.

If your employers sack you, they tell you that you can no longer work for them because you have done something that they did not like or because your work was not good enough.

When an army sacks a town or city, they destroy it, taking away all valuable things.

Some people refer to bed as the sack .