Definition of "bilinear" [bi•lin•e•ar]

• Linear with respect to each of two variables or positions. Used of functions or equations. (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.

• "The far right is the 720 export from 1080i original from iMovie, and I found out that the closest effect was seen when I resized 1080i image to 720 using 'bilinear' interpolation, very cheap way to resize an image."
• "However, the polarization identities will allow you to recover the bilinear function from the quadratic one."
• "EDIT: A note from The Unapologetic Mathematician that I should add: the metric tensor is a bilinear function of two vectors at a given point, while the line element is a quadratic function of a single vector."