1deck 
/ˈdɛk/ noun
plural decks /ˈdɛk/ noun 1 : a flat surface that forms the main outside floor of a boat or ship [count] ▪ We stood on the deck and watched dolphins swim near the ship. [noncount] ▪ A number of passengers had come on deck. ◊When you are below deck or below decks, you are in the section of a boat or ship that is under the deck.
▪ We went below deck to our cabin. ▪ I stowed my gear below decks. ◊The phrase all hands on deck is used to call all people on a boat or ship to the deck to do work that must be done.
▪ We heard the captain shout “All hands on deck!” as waves crashed over the boat's bow. 2 [count] a : one of the levels on a bus, ship, etc.
▪ the lower/middle/upper deck ▪ a seat on the streetcar's top deck ▪ a cabin on B deck
b : one of the seating levels in a sports stadium
▪ We sat in the lower/upper deck. 3 [count] chiefly US : a wood structure that has a floor but no walls or roof, is attached to a house or other building, and is used for sitting and relaxing
▪ We ate out on the deck. ▪ You can see into three different states from the mountaintop restaurant's observation deck. [=a platform built so that people can see or watch something] — see picture at house 4 [count] chiefly US : a complete set of playing cards : a group of 52 playing cards
▪ The dealer shuffled the deck (of cards). —called also pack ◊In informal U.S. English, someone who is not playing with a full deck is not able to think or act in a normal way.
▪ “He seemed a little weird.” “Yeah, he's not playing with a full deck.” 5 [count] : tape deck
▪ We went below deck to our cabin. ▪ I stowed my gear below decks. ◊The phrase all hands on deck is used to call all people on a boat or ship to the deck to do work that must be done.
▪ We heard the captain shout “All hands on deck!” as waves crashed over the boat's bow.
▪ the lower/middle/upper deck ▪ a seat on the streetcar's top deck ▪ a cabin on B deck
b : one of the seating levels in a sports stadium
▪ We sat in the lower/upper deck.
▪ We ate out on the deck. ▪ You can see into three different states from the mountaintop restaurant's observation deck. [=a platform built so that people can see or watch something] — see picture at house
▪ The dealer shuffled the deck (of cards). —called also pack ◊In informal U.S. English, someone who is not playing with a full deck is not able to think or act in a normal way.
▪ “He seemed a little weird.” “Yeah, he's not playing with a full deck.”
clear the decks also clear the deck
: to get ready for action or for something new : to get rid of something to make room for something else
▪ He wants to clear the decks before the election campaign starts. ▪ Firing the CEO will clear the decks for change within the company.
▪ He wants to clear the decks before the election campaign starts. ▪ Firing the CEO will clear the decks for change within the company.
hit the deck — see 1hit
on deck
US 1 baseball : waiting to bat next
▪ Smith is batting and Jones is on deck. 2 informal : next in a series
▪ The band's new song is on deck [=next] after this commercial break. — see also 1deck 1 (above)
▪ Smith is batting and Jones is on deck.
▪ The band's new song is on deck [=next] after this commercial break. — see also 1deck 1 (above)
