Color over color

What is “color over color” when using more than one color yarn?

You might need to elaborate on what exactly you’re doing with the two colors, but it in [I]stranded[/I] knitting it means to keep the color that you want to be a bit more dominant on ‘top’–the strands don’t cross in the back, but one is above the other and the one on top supposedly shows up more.

In [I]intarsia[/I] it may refer to crossing the yarns when you switch color so the color that you’re dropping is on top of the color you are picking up so they twist on he back to prevent holes.

Or it might mean neither.