Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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or

 
pronunciation:
or
features:
Homophone Note
part of speech: conjunction
definition 1: used to indicate alternatives.
Open the door or the window.Either you go or I will.
definition 2: used to indicate an alternative way of referring to the same thing.
Lightning bugs, or fireflies, can easily be seen at night during these few weeks of the summer.
definition 3: used to indicate different possibilities because of lack of certainty.
I'll be there in three or four hours.
Homophone Note
The words or, oar, and ore sound alike but have different meanings.