Pronunciation: (īs'boks"),[key] —n. 1. an insulated cabinet or chest with a partition for ice, used for preserving or cooling food, beverages, etc.
2. Older Use.an electric or gas refrigerator.
3. Naut.an enclosed area in the bottom of a vessel through which sea water can be pumped up for use in the condenser in icy waters.
4. Slang.an isolation cell in a prison.