Pronunciation: (bach),[key] —n. 1. a quantity or number coming at one time or taken together: a batch of prisoners. 2. the quantity of material prepared or required for one operation: mixing a batch of concrete. 3. the quantity of bread, cookies, dough, or the like, made at one baking.
4. Computers. a. a group of jobs, data, or programs treated as a unit for computer processing.
b. See batch processing. 5. Glassmaking. a. a quantity of raw materials mixed in proper proportions and prepared for fusion into glass.
b. the material so mixed.