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English definition of “odd”

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odd

adjective uk   /ɒd/ us    /ɑːd/

odd adjective (STRANGE)

B2 strange or unexpected: Her father was an odd man. What an odd thing to say. The skirt and jacket looked a bit odd together. That's odd - I'm sure I put my keys in this drawer and yet they're not here. It's odd that no one's seen him. It must be odd to live on the 43rd floor.
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odd adjective (NOT OFTEN)

C2 [before noun] not happening often: She does the odd teaching job but nothing permanent. You get the odd person who's rude to you but they're generally quite helpful.
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odd adjective (NUMBERS)

(of numbers) not able to be divided exactly by two: 3, 5, and 7 are all odd numbers. The houses on this side of the street have all got odd numbers.
Opposite

odd adjective (SEPARATED)

[before noun] (of something that should be in a pair or set) separated from its pair or set: He's got a whole drawer full of odd socks. I'd got a few odd (= I had various) balls of wool left over.
(Definition of odd adjective from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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