1. (

• pouch ,
• sac ,
• sack ,
• pocket

) an enclosed space; "the trapped miners found a pocket of air" ;

2. (

• theca ,
• sac

) a case or sheath especially a pollen sac or moss capsule ;

3. (

• Sauk ,
• Sac

) a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay ;

4. (

• sac

) a structure resembling a bag in an animal ;