- (mathematics, of a function in two variables) Linear (preserving linear combinations) in each variable.
- The function f(x,y)=xy is bilinear, because f(ax+bu,y)=a·f(x,y)+b·f(u,y) and f(x,ay+bv)=a⋅f(x,y)+b·f(x,v) for all values.
- (physics) Relating to or consisting of two linear functions.
- bilinear isotropic hardening
- (mathematics) A bilinear function
From bi- + linear.