four-by-four
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four-by-four
or 4 × 4 (fôr′bī-fôr′)n.
1. A four-wheel-drive motor vehicle.
2. A length of lumber that is 4 inches thick and 4 inches wide, or that is trimmed to slightly smaller dimensions.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
four-by-four
n
(Automotive Engineering) a vehicle equipped with four-wheel drive
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014