All 3 Uses

contrast
in
Kindred, by Octavia Butler
(Edited)

I wondered whether he was too used to the contrast to find it dizzying.
p. 69.9

contrast = difference
I couldn't help contrasting Nigel's lessons with Rufus's.
p. 106.4 *

contrasting = comparing in a way that shows differences
And the contrast made me bitter.
p. 106.4 *

contrast = difference

Definitions:

(1) (contrast as in: contrast their writing styles)
point to differences between; or compare to show differences
(2) (contrast as in: there is a contrast)
a difference -- especially a notable difference; or the side-x-side arrangement of things that draws attention to an unmissable difference
(3) (contrast as in: sharpen the picture contrast)
the difference between tones of an image -- as in a photo or video -- such as the quality of brightness or the intensity of shades or colors
(4) (meaning too rare to warrant focus)