three-decker

English Wikipedia has an article on:

three-decker

Wikipedia

three-decker (plural three-deckers)

1. Anything with three layers or levels.
   • 1972, Emily Coleman, Making friends with the opposite sex, page 198:

     I planned to splurge on a three-decker cone. All the flavors looked so good that I couldn't decide which three to have.

   1. Alternative form of triple-decker (“type of sandwich”)
   2. Alternative form of triple-decker (“type of bus”)
   3. Alternative form of triple-decker (“type of apartment building”)
   4. Alternative form of triple-decker (“type of headline”)
   5. (nautical, historical) A sailing warship that had guns on each of three decks.
   6. (historical) An old-fashioned pulpit.