sac meaning and definition

SAC noun

Definition of sac (noun)

1. an enclosed space
   • "the trapped miners found a pocket of air"
   • synonyms: pocket, pouch, sack
2. a case or sheath especially a pollen sac or moss capsule
   • synonyms: theca
3. a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay
   • synonyms: Sauk
4. a structure resembling a bag in an animal