Twentieth
Definition 1 of 2
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Ordinal Usage
Used to describe the order of something in a list, specifically the position after nineteenth. Samantha was the twentieth person to cross the finish line.
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Historical Context
Often used to refer to historical centuries, helps to place events in a time period. The telephone was invented in the twentieth century.
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Anniversary Significance
Marks the importance of a 20th recurring event or the passage of 19 complete years. They celebrated their twentieth wedding anniversary last June.