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English definition of “or”

or

conjunction (POSSIBILITIES)   /ɔr, ər/
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)
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