preposition | noun
oppositeopposite1 /ˈɑpəzɪt/ preposition 
► opposite preposition directly in front of a thing or person and on the other side of a road, path, area, or table. Opposite is used mostly in writing, and it is more common to say across from: The bathroom is opposite my bedroom upstairs. The museum is opposite the library.
► across from preposition across from means the same as opposite: I was sitting across from her at the table, so I heard everything she said.
► across preposition on the other side of a road, river, border, or area: Barbara lives here, and my house is across the street.
► facing verb in a position in which the front parts of two people or things are toward each other: We asked for a hotel room facing the ocean. ➔ GRAMMAR: Facing is used like a preposition, but it is a form of the verb face, which means “to be looking or pointing toward someone or something”: The back windows face west, so you can watch the sun set.
SYNONYM CHECKAcross or across from?If you are mentioning the road, river, etc. between things, you use across: We took a picture of the waterfall across the lake. If you are mentioning the person or thing that is on the other side, you use across from: The library is across from the auditorium. preposition | noun
oppositeopposite2 /ˈɑpəzɪt/ noun 1 someone or something that is completely different► the opposite someone or something that is as different as possible from someone or something else: Anna is quiet and shy, but her sister is just the opposite: she is very friendly. Russ asked for my opinion of what he should do, and then did the opposite. I wonder why he even asked!
► the reverse (formal) the opposite of a situation that you have just mentioned: In most of the world, populations are growing, but in Europe, the reverse is true: the number of births is going down.
► the contrary AWL (formal) the opposite of what has just been said or suggested. Use this in the expressions on the contrary, to the contrary, or quite the contrary to emphasize that the opposite of what has been asked or suggested is in fact true: No, Amanda is not jealous about her boyfriend. On the contrary, she seems happy when he makes new friends.
► the converse (formal) the exact opposite of a fact or statement: We know that building more roads leads to more cars and more traffic. The converse of this is also true: fewer or smaller roads will reduce traffic.
2 a word or meaning that is completely different► the opposite a word or meaning that is as different as possible from another word or meaning: “Light” is the opposite of both “dark” and “heavy.” I forgot to write “not,” so the sentence says the opposite of what I meant.
► antonym a word that means the opposite of another word: “Old” is an antonym of “young.”