triple–decker

noun, tri·ple–deck·er often attributive \ˌtri-pəl-ˈde-kər\

: something that has three levels or layers

Full Definition of TRIPLE-DECKER

: something having three basic components or levels: as

a : trilogy

b : a sandwich consisting of three pieces of bread and two layers of filling

c : a 3-story dwelling with an apartment on each floor

See triple–decker defined for English-language learners

1938

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