a large metal trash bin, often of a kind that is emptied, or transported to a dump, by a specially equipped truck
noun
such a trash bin
See Dumpster in American Heritage Dictionary 4
A trademark used for containers designed for receiving, transporting, and dumping waste materials. This trademark often occurs in print in lowercase: “[The street is] lined with low-cost apartment buildings and strewn with blue dumpsters”(Chicago Tribune).