Top definition
The years 1901 A.D. to 2000 A.D., identified as the twentieth century of the world since the start of A.D.
The electrical grid in the eastern U.S. was the declared as "the great electrical system of the 20th century". The problem is, this is the 21st century.
by Jon Davis January 14, 2004
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2
My computer is so 20th century.
That music is so 20th century.
His values are so 20th century.
by Arizona Jaguar September 18, 2005
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3
by KillaKan June 20, 2005
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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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