Deck is a word that is used as a verb and as a noun as well and when using the word as a noun it describes a kind of area on a ship that forms the outside floor of it. Given below is a sentence that can play a vital role in making you understand the word well: When the storm began, everyone on the ship disappeared below deck. Sometimes the word can also be used for a wooden floor that you found usually in the back of a house and people use it to get relaxed.
When you are using the word as a verb usually it is used in association with 'somebody or something' and is used mostly to convey the idea of decorating something. Informally, the word can also be used when you are hitting somebody very hard to make him fall on the ground.