Meaning of linear combination

lin'ear combina'tion

Pronunciation: [key]
— Math. Math.(of mathematical quantities)
  1. a sum of products of each quantity times a constant:aX + bY + cZ is a linear combination of X, Y, and Z, where a, b, and c are constants. The expression
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.