Oxford Advanced American Dictionary

Definition of Saturday noun from the Oxford Advanced Learner's Dictionary

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Saturday

noun
saturday pronunciation English ˈsætədeɪ saturday pronunciation American ˈsætərdeɪ
saturday pronunciation English ˈsætədi saturday pronunciation American ˈsætərdi
[countable, uncountable] (abbr. Sat.)
 
the day of the week after Friday and before Sunday
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To see how Saturday is used, look at the examples at Monday.
From the Old English for ‘day of Saturn’, translated from Latin Saturni dies.