What is meant by nm technology?

Hi Everybody.
First of all, this is not a homework. I am just asking this out of Curiosity. (I am clarifying this because my previous 2 question got an allegation of Homework)

Today I was checking my PC info via speccy and I saw in CPU section, there is written:

Technology: 45nm

What the HECK is 45 nm technology.
I tried to research on google and found much much complicated definitions than what I can understand.

If anyone could just simplify it and explain it to me, then it will be very helpful.

Thanks for reading this question,

Himansh
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More about what meant technology
  1. 45nm (nanometers) is the wavelength that the CPU's are built on. It is the size of the transistors built into the CPU.
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