D defs.my
Entry 2 senses Webster, 1913

Decker

/(dĕk"ẽr)/ · Deck·er · IPA /ˈdɛkə(ɹ)/
01 n. One who, or that which, decks or adorns; a coverer; as, a table decker.
  1. 1.
    One who, or that which, decks or adorns; a coverer; as, a table decker.
  2. 2.
    A vessel or vehicle which has a deck or decks; -- used esp. in composition; as, a single-decker; a three-decker; a double-decker bus.