At the turn of the century-what does this mean?

[Duc]

Hello everyone,
Please read this sentence :''He was born in the US [at the turn of the century]''
Please tell me the meaning of ''at the turn of the century'' because it doesn't appear in many dictionary I have looked up.[/i]
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Don't see your shade think you are great

[Haihao]

It's around the end of an old century or the beginning of a new century. (the old one is turning to the new one)