three-decker

noun
three-deck·​er | \ ˈthrē-ˈde-kər How to pronounce three-decker (audio) \

Definition of three-decker

1 : a wooden warship carrying guns on three decks

First Known Use of three-decker

1795, in the meaning defined at sense 1

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The first known use of three-decker was in 1795

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