no.
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... then what is the question?
Distance.
It means that the direction of the vector is that same as before but the magnitude has been changed - by a scalar factor.
Oh, dude, like, technically speaking, depth is not a vector because it's a scalar quantity that only has magnitude, not direction. So, yeah, if you're looking for some vector action, depth ain't gonna cut it. But hey, who needs direction when you've got depth, am I right?
The dot-product of two vectors is the product of their magnitudes multiplied by the cosine of the angle between them. The dot-product is a scalar quantity.