deck 1 (d?k)n.1. A platform extending horizontally from one side of a ship to the other.2. a. A platform or surface likened to a ship’s deck.b. An unroofed platform, typically with a railing, that adjoins a building or is built on a rooftop.c. The roadway of a bridge or an elevated freeway.3. The piece of hard material, usually wood or composite, to which the frames housing the wheels are attached on a skateboard or landboard.4. a. A pack of playing cards.b. A group of data processing cards.c. A digital file containing slides for a presentation.5. A tape deck.tr.v. decked, deck·ing, decks 1. To furnish with or as if with a deck.2. Slang To knock down: He decked his sparring partner.Idioms: clear the deck Informal To prepare for action. hit the deck Slang 1. To get out of bed.2. To fall or drop to a prone position.3. To prepare for action. on deck1. On hand; present.2. Sports Waiting to take one’s turn, especially as a batter in baseball.[Middle English dekke, from Middle Dutch dec, roof, covering; see (s)teg- in Indo-European roots.]deck 2 (d?k)tr.v. decked, deck·ing, decks 1. To clothe with finery; adorn. Often used with out: We were all decked out for the party.2. To decorate: decked the halls for the holidays.[Dutch dekken, to cover, from Middle Dutch decken; see (s)teg- in Indo-European roots.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.deck (d?k) n1. (Nautical Terms) nautical any of various platforms built into a vessel: a promenade deck; the poop deck. 2. a similar floor or platform, as in a bus3. (Electronics) a. the horizontal platform that supports the turntable and pick-up of a record playerb. See tape deck4. (Card Games) chiefly US a pack of playing cards5. (Computer Science) computing obsolete Also called: pack a collection of punched cards relevant to a particular program6. (Architecture) a raised wooden platform built in a garden to provide a seating area7. clear the decks informal to prepare for action, as by removing obstacles from a field of activity or combat8. hit the deck informal a. to fall to the floor or ground, esp in order to avoid injuryb. to prepare for actionc. to get out of bedvb (tr) 9. (often foll by out) to dress or decorate10. (Nautical Terms) to build a deck on (a vessel)11. slang to knock (a person) to the floor or ground[C15: from Middle Dutch dec a covering; related to thatch] ?decker nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014deck (d?k) n. 1. a. a floorlike surface wholly or partially occupying one level of a hull, superstructure, or deckhouse of a vessel. b. the space between such a surface and the next such surface above. 2. a platform, surface, or level suggesting the deck of a ship. 3. an open, unroofed porch or platform extending from a house or other building. 4. the roadway of a bridge. 5. a pack of playing cards. 6. a cassette deck or tape deck. 7. Slang. a small packet of a narcotic, esp. heroin. v.t. 8. to clothe or array in something dressy or festive (often fol. by out): all decked out for the party. 9. to furnish with a deck. 10. Informal. to knock down; floor. Idioms: 1. clear the decks, to prepare for some activity or work. 2. hit the deck, a. to fall or drop to the floor or ground. b. to get out of bed. 3. on deck, a. present and ready to act or work. b. Baseball. next at bat. [1425?75; late Middle English dekke material for covering