ˈ ̷ ̷| ̷ ̷ ̷ ̷ noun
Etymology: three-deck + -er
1.
a. : a warship carrying guns on three decks
b. : a cargo or passenger ship with three full decks
2.
a. : a structure having three floors, stories, or tiers: as
(1) : the clerk's desk, reading desk, and pulpit proper arranged one above the other on three separate levels in some churches
(2) : a sandwich made of three slices of bread and two fillings
b. : a book and especially a novel in three volumes ; broadly : an unusually long novel
3. : a thing of great importance, size, or eminence