American Heritage Dictionary
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Century Dictionary
GNU Webster's 1913
WordNet
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Elsewhere on the web
An open face also lets the flange on the bottom of the club slide more easily along the ground instead of dig, which is critical for controlling backspin.
Use the quick-play controls to curve around hills, "backspin" on greens and— WMExperts
This also gives you the flexibility to turn one wheel faster than the other, to impart backspin or forespin or side-spin (when mounted sideways) or similar.— Make - All Discussions
You can also control backspin, draw / fade and loft / punch setup for each shot with sliders on the left hand side of the screen.— IntoMobile
The greater the backspin, the higher the ball will fly and the more it will spin, and therefore stop or even spin backwards on impact with the turf.

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