Definition of iceboxes:
(n) :
A box or compartment containing ice, typically used to keep provisions cool.
(n) :
(UK) A compartment in a refrigerator that is colder than the rest of the refrigerator and is used as a freezer.
(n) :
(US, dated) A refrigerator.
(n) :
(US, slang) A city with a cold or snowy climate.
(n) :
(US, slang) A prison.
(n) :
(US, slang) A morgue.