American Heritage Dictionary
(3)
Century Dictionary
(9)
GNU Webster's 1913
(1)
WordNet
(3)
Elsewhere on the web
The only reason that war is limited, according to Clausewitz is political calculation or what he called "friction" - the fog of war that slows down military operations.— MercatorNet
The closer our friction variable is to one the slicker our surface is … If the friction is above one our ship will gain speed, below one it will lose speed.— Pixel2Life.com: Latest 15 Tutorials
The floor of the playing area is low-friction, as are the robots 'regulation wheels, so the team had to install traction-control sensors and related software to make things work.— Paul & Matt's Sports Attack
Middlemen were friction, and the Web was a friction-removing machine.— doggdot.us
Adding to the friction is the fact that with three weeks to go before St. Louis hosts the NCAA Women's Final Four, the event's local organizing committee is $500,000 short of the money it needs to cover its expenses.— St. Louis Business News - Local St. Louis News | The St. Louis Business Journal

American Heritage Dictionary (1)
Century Dictionary (1)
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