Meaning of three-decker

three-deck•er

Pronunciation: (thrē'dek'ur), [key]
— n.
  1. any ship having three decks, tiers, etc.
  2. (formerly) one of a class of sailing warships that carried guns on three decks.
  3. a sandwich made of three slices of bread interlaid with two layers of filling; club sandwich.
  4. something having three layers, levels, or tiers. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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