Definition of "orthogonal" []

• Relating to or composed of right angles. (adjective)
• Mathematics Of or relating to a matrix whose transpose equals its inverse. (adjective)
• Mathematics Of or relating to a linear transformation that preserves the length of vectors. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Matthew C, the reason they are supposed to be orthogonal is because g is the correlation among all the tests."
• "I have never been described as orthogonal - and yet it is such a good descriptor for how I see the world"
• "These are the so-called orthogonal transformations."