or

/ɔr/, /ər/ conjunction (POSSIBILITIES)

Definition

› used to connect different possibilities: Is today Tuesday or Wednesday? You can get that blouse in blue, gray, or white. There were ten or twelve people in the room (= approximately that number of people). We’d better make a decision soon or the whole deal will fall through. › After a negative verb, or can also continue the negative meaning of the verb: He won’t eat meat or fish (= and will not eat fish either).

(Definition of or conjunction (POSSIBILITIES) from the Cambridge Academic Content Dictionary © Cambridge University Press)