v., -tract·ed, -tract·ing, -tracts. v.tr.
To take away; deduct.
v.intr.
To perform the arithmetic operation of subtraction.
[Latin subtrahere, subtract- : sub-, sub- + trahere, to draw.]
subtracter sub·tract'er n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.